Abstract

Two decades ago, a liability crisis brought on by concerns about the safety of diphtheria and tetanus toxoids and pertussis vaccine led to supply shortages and calls for rationing of the vaccine. Vaccine prices skyrocketed, and research on new products was threatened. In response, Congress created the National Vaccine Injury Compensation Program, which is tort reform legislation designed to compensate individuals quickly, easily, and generously. Since 1988, the Vaccine Injury Compensation Program has stabilized the marketplace, as evidenced by high immunization rates, stable pricing, and an increasing number of vaccine candidates in development. Although current vaccine shortages do not appear to be related to issues of liability, a new wave of tort litigation alleging that some vaccines cause autism has led to speculation that history could repeat itself.

In the 1980s, shortages of diphtheria and tetanus toxoids and pertussis (DTP) vaccine supplies occurred after hundreds of lawsuits alleging that the vaccine caused injury and death were filed against vaccine manufacturers and administrators [1]. The costs of defending against and potentially providing compensation to hundreds of claimants led many companies to cease production of the vaccine. By 1984, calls for the rationing of DTP vaccine were further proof of a deteriorating marketplace. In addition, exponential increases in vaccine prices, the uncertainty of vaccine research and development, and the real possibility of disease outbreaks all made it clear that something had to be done quickly. An informal coalition of parents, physicians, attorneys, and representatives of the vaccine industry convinced Congress to pass compromise legislation known as the National Childhood Vaccine Injury Act of 1986 (NCVIA). A key component of the act, the National Vaccine Injury Compensation Program (VICP), became operational 2 years later.

The controversy regarding injuries and illnesses caused by vaccines weighed heavily in creating the VICP's framework and the NCVIA's sweeping vaccine safety provisions. The US federal government was essentially brought into a full-time vaccine safety role. The NCVIA included a mandate for reporting adverse events listed on a newly created table of medical conditions (“Vaccine Injury Table”), as well as any contraindicating reaction to a vaccine that is specified in the manufacturer's package insert. These reports are made to the Vaccine Adverse Event Reporting System. Other vaccine safety mandates included office record-keeping (i.e., documenting the date of vaccine administration, the manufacturer and lot number, and the name and address of the administrator), development of risk-benefit information materials (“Vaccine Information Statements”), and Institute of Medicine (IOM) studies of adverse events associated with covered vaccines.

The NCVIA also provided for 2 advisory panels, the Advisory Commission on Childhood Vaccines and the National Vaccine Advisory Committee. Mirroring the forces underlying passage of the NCVIA, the Advisory Commission on Childhood Vaccines comprises parents, physicians, and attorneys (bringing petitioner and industry perspectives), whose charge it is to monitor the VICP. The Advisory Commission on Childhood Vaccines makes recommendations to the Secretary of the US Department of Health and Human Services (DHHS) by advising on changes to the Vaccine Injury Table and by monitoring vaccine safety.

The National Vaccine Advisory Committee has much broader responsibilities of reviewing and making recommendations concerning research on and production, delivery, safety, and efficacy of vaccines. Recommendations are forwarded to the DHHS Assistant Secretary for Health and have included ad hoc committee reviews of the risks associated with each of the vaccines listed in the Vaccine Injury Table.

Background, Structure, and Process

The VICP was designed to address a variety of public policy needs [2–4]. First, and most important, it is only simple justice that individuals who are inadvertently injured by properly produced vaccines that are administered through public health programs should receive compensation. Because society mandates the use of vaccines, through state laws for school enrollment, it is reasonable and appropriate that society take responsibility for unavoidable adverse outcomes associated with the use of vaccines. Second, the delays and uncertainties of the tort system warranted a more reasonable and fair approach. Third, disruptions of vaccine production and supply would inevitably lead to serious outbreaks of otherwise preventable disease. Fourth, the unprecedented vaccine price increases were caused largely by the projected costs of litigation, as calculated by the manufacturers. Fifth, the increasing scientific capability for the production of new and improved vaccines obviously required considerable interest and investment on the part of biologics manufacturers. The litigious climate surrounding the use of vaccines was detrimental to such efforts. Finally, there was no evidence that the problem of vaccine liability was going to disappear, particularly in view of the attention devoted to it by the media.

Congress addressed these needs by creating a federal no-fault system under which awards can be made to individuals who are injured by vaccines quickly, easily, and generously. Persons injured through the receipt of a vaccine are required to file claims with the VICP before they are allowed to bring a civil lawsuit. Rules of evidence, discovery, and other legal procedures are relaxed, to accelerate the compensation process. Negligence on the part of the manufacturer or health care provider is removed from proceedings—thus, the “no-fault” designation. Judgments (whether dismissing the claim or awarding compensation) must be expressly rejected by the petitioner before a civil lawsuit can be filed. Once a judgment is rejected, a person essentially forfeits any right to compensation under the program and can seek remedies only through other channels.

Additional protections for manufacturers were provided for lawsuits filed outside the VICP. These protections included the elimination of plaintiff allegations of vaccine misdesign or inadequate warning of risk, which were 2 common tort theories pursued in the 1980s, and the elimination of punitive damages, unless it could be proven that production of the vaccine was marred by fraud, intentional wrongdoing, or criminal activity [5].

A unique feature of the Act was creation of the Vaccine Injury Table and its definitional counterpart, the Qualifications and Aids to its Interpretation (“Aids to Interpretation”) [6, 7]. Individuals may receive compensation if they can prove, by a preponderance of the evidence (i.e., more likely than not) that an injury listed in the Vaccine Injury Table occurred within the prescribed time frame. The government may successfully counter this allegation with greater evidence of an alternate cause. However, this “factor unrelated to the vaccine” cannot include “any idiopathic, unexplained, unknown, hypothetical, or undocumentable injury, illness or condition.” It can include “infection, toxins, trauma, or metabolic disturbances” [8]. This simplified approach greatly reduces the burden of proving causation, which is necessary in civil courts to prove the occurrence of medical malpractice.

The VICP involves 3 governmental entities: the DHHS, the Department of Justice (DOJ), and the US Court of Federal Claims. Petitioners, either through an attorney or on their own, file a petition with the DHHS and the Court, which begin the review and adjudication process. A physician or nurse in the DHHS Health Resources and Services Administration's Division of Vaccine Injury Compensation has 90 days to review the documents The medical staff develops a recommendation for or against entitlement to compensation, which is then forwarded to the Court through the DOJ attorney assigned to the case. A distinguished group of pediatric and adult medical subspecialists may, at times, assist VICP staff in reaching a decision on eligibility, and they routinely testify on behalf of the Secretary in hearings.

As an initial matter, eligibility for receiving compensation is based on proving 1 of 3 elements: (1) an injury listed on the Vaccine Injury Table occurred during the prescribed interval; or (2) the vaccine actually caused the injury, if it is listed in the Table, but the injury either occurred after the specified interval or is not listed; or (3) the vaccine significantly aggravated a preexisting medical condition. Petitioners are not eligible to receive compensation, however, if the Court determines that there is greater evidence of a non—vaccine-related cause for the injury.

In addition to satisfying one of these elements, petitioners must also show that there were continued effects for >6 months, except in the case of a vaccine-related death or if the vaccine-related injury necessitated “inpatient hospitalization and surgical intervention.” This latter exception was added by Congress in 2000, because infants who experience intussusception (an adverse event causally related to some rotavirus vaccines) usually recover completely and, therefore, would not satisfy the “continued effects” provision. Language was passed providing eligibility for compensation for those infants who were hospitalized and underwent surgery [9].

Final decisions are made by special masters, court-appointed lawyers with expertise in the legal and medical issues associated with adverse reactions to vaccines. Eligibility for compensation is recommended if the VICP and DOJ staff find that the records fulfill the requirements of the Act. The court nearly always concurs with an entitlement recommendation, thereby obviating the need for a hearing.

When entitlement to compensation is conceded, the DOJ and the petitioner try to reach agreement on the amount of compensation (damages). The level of compensation is often based on lifelong care plans that evaluate the health of the injured person and the person's future needs. The government and petitioner often use informal negotiations under the guidance of a special master to resolve entitlement and damages issues. Alternative dispute resolution is increasingly being used to avoid having to hold a formal hearing.

Those cases not conceded by the DHHS usually proceed to a hearing before a special master, at which point, testimony from both sides is presented, including testimony from medical expert witnesses for each party. After hearing testimony from both sides, the Court engages in an evaluation of the weight and credibility of the evidence. This may or may not result in an award of compensation.

Compensation for minors or incompetent persons is usually in the form of a lump-sum payment and an annuity designed to provide a lifetime stream of benefits. Elements of compensation include medical care, lost wages, and pain and suffering. Compensation for death claims is awarded in a lump-sum payment capped at $250,000. “Reasonable” attorneys' fees and costs are paid whether or not petitioners are successful in obtaining compensation, if the claim is brought in good faith and on a reasonable basis. Punitive damages and awards to others in the family for loss of companionship are not allowed. Decisions of the special masters may be appealed by either party to a judge of the Court of Federal Claims and then to the US Court of Appeals for the Federal Circuit. One VICP case decided by the Federal Circuit was reviewed by the Supreme Court. One provision omitted from the 1986 legislation was a mechanism for adding new vaccines to the VICP. The Omnibus Budget Reconciliation Act of 1993 corrected this omission by mandating that vaccines recommended by the Centers for Disease Control and Prevention (usually on the basis of a vote by the Advisory Committee on Immunization Practices) for routine administration to children be added to the VICP [10]. However, it is only after enactment of an excise tax by Congress that the vaccine is officially covered by the program. Once the vaccine is added, there are 8 years of retroactive coverage (based on the effective date of the excise tax) for individuals alleging that injury resulted from administration of vaccines before the start of coverage, with a 2-year window in which to file these “older” claims. For newly added vaccines, adverse events occurring during prelicensure clinical trails may be eligible for compensation, although the VICP has yet to receive such a claim. Implementation and Program Experience The VICP began receiving claims on 1 October 1988, which is the date of enactment and differentiates 2 categories of petitioners. Retrospective claims, which are for vaccines administered before 1 October 1988, had to be filed by 31 January 1991. Thousands of claims, nearly one-third of which involved vaccines administered during the 1950s and 1960s, were filed by the deadline (table 1). Compensation was paid from the appropriations from the Treasury authorized by Congress each year. As of September 2004, all retrospective claims had been adjudicated. Prospective claims are for vaccines administered on or after 1 October 1988. These claims must be filed either within 36 months after the first postvaccination symptom appears or, in the case of a death, within 24 months of the death and within 48 months after the onset of the vaccine-related injury that resulted in death. Funding is provided through a tax of$0.75 placed on each dose (or disease prevented) of designated childhood vaccine. For example, the excise tax on diphtheria and tetanus toxoids and acellular pertussis vaccine is $2.25, whereas the tax on inactivated poliovirus vaccine is$0.75 [11]. (Initially, the tax was determined on the basis of estimates of awards related to each vaccine.) As of July 2005, the Vaccine Injury Compensation Trust Fund contained >$2.1 billion, compared with average outlays of ∼$61 million annually over the previous 6 years. Monies from the trust fund can be used only for VICP compensation and for administrative expenses of the DHHS, the DOJ, and the Court.

As of July 2005, the VICP covered Haemophilus influenzae type b (Hib); diphtheria, tetanus, and pertussis (e.g., DTP, DTaP, DT, TD, and TT); measles, mumps, and rubella (MMR, MR, M, and R); poliovirus (both inactivated poliovirus and oral poliovirus); hepatitis B virus (HBV); varicella-zoster virus (VZV); rotavirus (RV); pneumococcal conjugate (PCV); and trivalent influenza virus (TIV and LAIV). Over the history of the program, the majority (61%) of claims alleged the occurrence of DTP-related effects. In contrast, <200 claims alleging injuries related to receipt of diphtheria and tetanus toxoids and acellular pertussis vaccine had been filed by mid-2005.

The breakdown of the remaining cases is as follows: 14% involved MMR vaccine, given alone or in any combination (approximately one-fifth of these cases involve adults alleging rubella vaccine—related injury), 7% involved HBV vaccine, 5% involved oral poliovirus vaccine, 4% involved inactivated poliovirus vaccine (except for 3 claims, all for vaccines administered before 1970), and 3% involved tetanus-containing vaccines. Other than for HBV vaccine, only small numbers of claims have been filed for the newly added vaccines. (Not included in these percentages are >4700 “unspecified” claims, which allege injury resulting from multiple vaccines as part of the MMR, thimerosal, and autism litigation (see Public Policy Outcomes). Overall, injuries account for 86% of claims, and deaths account for 14% of claims.

Modifying The Vaccine Injury Table

By law, the Vaccine Injury Table and Aids to Interpretation can be modified or amended by DHHS regulation in consultation with the Advisory Commission on Childhood Vaccines, after the public has had opportunity to comment. Separate efforts by the VICP to modify the Vaccine Injury Table and Aids to Interpretation began with publication of the 2 Congressionally mandated IOM reviews in 1991 and 1994, respectively [12–15]. The first set of changes, effective 10 March 1995, added the injury of chronic arthritis for rubella-containing vaccines and removed shock-collapse and residual seizure disorder for the DTP vaccine [16]. Clarifications were also made in the definitions of residual seizure disorder and encephalopathy in the Aids to Interpretation. The changes to the Vaccine Injury Table and Aids to Interpretation for DTP vaccine generated controversy and eventually drew the attention of Congress.

The second set of changes to the Vaccine Injury Table was far less controversial and was based on the 1994 IOM report covering the 5 remaining VICP vaccines, as well as Hib and HBV vaccines [17]. As mandated by the Omnibus Budget Reconciliation Act of 1993, Hib, HBV, and varicella-zoster virus vaccines were added to the VICP, because all of them were recommended by Centers for Disease Control and Prevention for routine administration to children. The other modifications, effective 24 March 1997, included the addition of thrombocytopenia to the Vaccine Injury Table, for measles virus—containing vaccines, and brachial neuritis, for tetanus toxoids—containing vaccines. Coverage of the 3 new vaccines, however, did not begin until Congress established an excise tax effective 7 August 1997 [11].

Since then, the Vaccine Injury Table has been modified further, with the general category of rotavirus vaccine added, effective 21 October 1998 [18], and pneumococcal conjugate vaccines added, effective 19 December 1999 [19, 20]. In a final rule published in July 2002, intussusception was added as a listed injury to the Vaccine Injury Table, under a second category of rotavirus vaccines (i.e., live, oral, and rhesus based); other technical changes were also added. Notices of coverage for hepatitis A virus vaccines and trivalent influenza virus vaccines were published in the Federal Register in December 2004 and April 2005, respectively (see Current and Future Directions) [21, 22].

Public Policy Outcomes

Congress expected that the Act would, once and for all, address the liability and public health problems surrounding immunization. It would appear that the VICP has done so, in large measure. First, compensation awards have been made to >1900 families and individuals (apart from attorneys' fees and costs in numerous other cases). Second, the marketplace is much more stable, with immunization rates at an all-time high and several new, recently licensed vaccines [23]. Annual Investigational New Drug requests to the Food and Drug Administration, a necessary step in beginning testing in human subjects, initially increased and have remained steady from 1986 to the present, signaling renewed confidence in vaccine research and development (data from the Center for Biologics Evaluation and Research, Food and Drug Administration). The dramatic increases in the prices of childhood vaccines of the past, which manufacturers associated with liability, have stopped. Today, vaccine prices reflect public- and private-sector purchase trends and the effects of inflation, rather than concerns about liability or repercussions. Although the supply shortages of childhood vaccines from 2000 to 2003 brought back memories of the vaccine shortages of 1980s, there is no evidence that liability concerns were responsible.

Another benefit of the NCVIA was the tort reform measures. The limited rules of discovery and the short, informal hearings that apply in VICP cases have eliminated or ameliorated many of the problems inherent in the tort system. Adjudication times for VICP cases are much shorter than those for the civil system, averaging 3.0 years for vaccines administered after 1988. Moreover, many of the hearings before the special masters are concluded within a day and are less adversarial than they were under the tort system. Program awards are generally structured to ensure petitioners a lifetime stream of benefits.

Perhaps the most important barometer of success of the NCVIA is civil litigation. The number of DTP vaccine—related claims against US companies had remained low for more than a decade (figure 1). Some recent lawsuits involving cases already adjudicated by the VICP have already been dismissed, whereas others are still pending adjudication. Although claims against health care providers are more difficult to track, there is no indication that the liability experience of these providers is any different from that of manufacturers. However, a new trend in civil litigation appears to have the potential to adversely affect future vaccine supplies.

Starting in 2001, individual and class action lawsuits were filed in state and Federal courts alleging that the MMR vaccine or vaccines containing thimerosal, an ethylmercury compound used as a preservative for decades in the formulation of many routine childhood vaccines, caused autism (or other neurodevelopmental disorders). By the end of 2004, >350 lawsuits against vaccine manufacturers and administrators were pending in >20 states [24], despite the fact that IOM reports in 2001 found no proven evidence of a causal relationship between receipt of childhood vaccines and the development of autism (or other neurodevelopmental disorders) [25, 26]. More significantly, in a follow-up report, the IOM concluded that there is proven evidence against a causal relationship between both MMR vaccines and thimerosal-containing vaccines and autism, on the basis of controlled epidemiological studies published in the interim [27].

Although the NCVIA requires individuals alleging vaccine-related injuries for covered vaccines to first file with the VICP before pursuing civil actions, many plaintiffs adopted several strategies to circumvent this requirement. Plaintiffs argue that their actions are not governed by the VICP, because they allege that thimerosal is an “adulterant” to, and not a part of, vaccines. This argument hinges on the Act's definition of a “vaccine-related injury or death,” which excludes any injury or death associated with an adulterant or contaminant intentionally added to a covered vaccine [28]. Over time, courts are rejecting this argument dismissing “individual lawsuits” filed on behalf of an injured party, usually a child, who is alleged to be developmentally impaired. Others, so-called “derivative claims,” filed on behalf of parents or other family members seeking damages for certain losses (e.g., companionship, consortium, or services) are often allowed to continue, because these types of damages are not covered under the Act. Plaintiffs are also filing “medical monitoring” class action lawsuits that do not allege specific injuries, but, instead, demand the costs of medical monitoring to determine whether thimerosal-related injuries will develop in the future. Individuals numbering in the thousands to millions are each seeking $999.00 in damages, a strategy based on the Act's prohibiting individuals from suing a vaccine company of administrator for damages >$1000.00 [29]. Most of these lawsuits were being dismissed by early 2005 [24].

In late 2001, in addition to civil litigation, the VICP began receiving claims alleging vaccine-related autism, first for MMR vaccine (which is an attenuated live, viral vaccine and has never contained thimerosal), and then for a variety of other childhood vaccines. More recently, claims have been filed alleging thimerosal-related injury associated with several different vaccines (e.g., DTP, Hib, and HBV vaccines). Some of these filings include individuals who had pursued an adulterant theory in civil courts and were subsequently dismissed in pretrial motions.

In recognition of the likelihood of large numbers of claims, the Court set up a unique proceeding allowing the filing of simple petitions without accompanying medical records or other supporting documents (e.g., affidavits). General Autism Order I, which was issued on 2 July 2002, outlined a 2-step process of discovery followed by an evidentiary hearing on the merits of causation generally [30]. A decision on injuries and illnesses caused by vaccines, expected by 2 July 2004, would then be applied to individual claims. As of July 2005, >4700 claims had been filed for inclusion in the Omnibus Autism Proceeding, and discovery was ongoing. Petitioners may opt out of the autism proceeding, either to pursue their case individually within the VICP or to withdraw in order to seek remedies in the tort system if the NCVIA's requirements are satisfied. Several dozen petitioners had withdrawn their claims as of July 2005. The Court is expected to issue a new hearing date on causation once the discovery process nears completion.

Congressional Oversight

In recent years, Congress has increased its oversight of the VICP. Criticism has focused on the adversarial nature of the program, the time required for adjudication, the changes to the Vaccine Injury Table, the huge surplus in the trust fund, and the fact that the public is not well informed about the existence of the VICP. In reports issued in December 1999 and March 2000, the General Accounting Office found the VICP adjudication process to be easier than the traditional tort system but not as streamlined as Congress had originally intended [31, 32]. Moreover, although there appeared to be a scientific basis for the changes to the Vaccine Injury Table made by the DHHS, the General Accounting Office found some inconsistencies in applying results of the IOM studies. As for the trust fund, solutions varied depending on stakeholder perspective, with petitioners wanting more claims compensated by decreasing the burden of proof, vaccine manufacturers wanting the tax reduced to reduce costs, and researchers calling for a portion of incoming revenues annually to pay for vaccine safety research and surveillance.

In the end, the only recommendation of the General Accounting Office was that the DHHS publish a clear methodology for future changes to the Vaccine Injury Table, to help ensure that the changes are perceived as being fair. The second report, which focused only on the trust fund, had no recommendation.

In September 1999, the Subcommittee on Drugs and Criminal Justice, which is part of the House Government Reform Committee, held the first of 3 hearings on the VICP. Two more hearings by the full committee followed in November and December 2001. The parents of injured children, petitioners' attorneys, medical experts, and representatives of the program testified. In October 2000, a bipartisan report released by the Subcommittee made the following recommendations: (1) a review of the Vaccine Injury Table to ensure the inclusion of current science; (2) the increased use of speedy informal dispute resolution; and (3) the development of an alternative standard for cases not related to the Vaccine Injury Table. The last recommendation is proving to be the most challenging [33].

In contrast to the beginning of the VICP, when most claims alleged an injury listed on the Vaccine Injury Table, the majority of claims filed today allege conditions not listed in the Vaccine Injury Table. Admittedly, the 1995 modifications to the Vaccine Injury Table and Aids to Interpretation forced some claimants to pursue their claims on a causation basis. Probably more significant has been the addition of new vaccines for which few injuries are listed in the Vaccine Injury Table. Since 1997, only 2 injuries have been added for the 7 new vaccines. Moreover, of nearly 450 claims related to HBV vaccine, none involve anaphylaxis or anaphylactic shock, the only condition listed for this vaccine on the Vaccine Injury Table. Having to pursue such claims on the basis of causation is more difficult, because petitioners are not afforded the presumption of causation given to petitioners bringing claims of injuries listed in the Vaccine Injury Table. It is also likely that a greater number of hearings on entitlement will be required.

The Subcommittee's call for the development of an alternate standard reflects this reality and has led to developments in 2 areas. In December 2000, a proposal by the American Academy of Pediatrics to use a more relaxed standard for adjudicating injuries not listed in the Vaccine Injury Table was presented to the Advisory Commission on Childhood Vaccines [34]. Furthermore, 2 decisions by the Chief Special Master highlighted the complex challenge of determining causation in vaccine injury cases [35, 36]. As in the past, the US Court of Appeals for the Federal Circuit may rule on these interpretations of the NCVIA and render additional guidance on making causation in fact decisions.

By the spring of 2005, legislation introduced in the House contained various process improvements to the VICP, including increased compensation for death claims and an increase in the statute of limitations to 6 years for both injury and death claims [37]. A Senate bill introduced in the previous Congressional session was similar but also included additional language aimed at tightening the restrictions on filing of lawsuits in the civil system without first filing with the VICP [38]. Neither bill has been acted upon by the time of publication.

Current and Future Directions

During the 1990s, some experts suggested adding more selective-use vaccines (e.g., influenza virus and pneumococcal polysaccharide vaccines, which are used primarily for adults) to the VICP. A National Vaccine Advisory Committee review in 1996 found little evidence to support the need, on the basis of liability concerns expressed by manufacturers and health care providers [39]. However, with studies showing increased morbidity due to influenza among preschool-aged children, the Centers for Disease Control and Prevention formally recommended influenza virus vaccine for routine use in 6–23-month-old children, commencing with the 2004–2005 influenza season [40]. Passage of the American Jobs Protection Act of 2004 led to imposition of excise taxes on trivalent influenza virus vaccines administered during each influenza season (both the injectable and nasal spray products) and on hepatitis A vaccines [41]. Notices of Coverage were published in the Federal Register announcing that 1 December 2004 and 1 July 2005 would be the effective dates of coverage for hepatitis A virus and trivalent influenza virus vaccines, respectively [21, 22]. By specifying trivalent influenza virus vaccines for coverage, Congress chose to distinguish between adding to the VICP routine trivalent vaccines administered annually in seasonal influenza campaigns and a future licensed monovalent product that would be used in a influenza pandemic. Legislation signed into law at the end of 2005 addressed liability protection for industry and limited compensation for individuals harmed by a vaccine, in the event of a future pandemic [42].

Another category of vaccines for possible inclusion are those for which development may be impeded by liability concerns. Vaccines against group B streptococci, cytomegalovirus, and respiratory syncytial virus disease, all of which cause significant morbidity and mortality among infants, are currently in development. Vaccination of pregnant women against these diseases holds great promise for protecting very young infants. Even though infants would receive the benefit of vaccination, the fact that the vaccines would not be administered directly to infants or children prevents their inclusion in the VICP, on the basis of current law. Adding this category of vaccine, however, would require Congressional action [43].

In conclusion, the VICP appears to have satisfied the critical public policy concerns that brought about passage of the program nearly 20 years ago. The instability of the past is long gone, replaced by a more stable marketplace with the expectation of new, innovative products and technology. Although there is uncertainty over the autism litigation, there is reason to believe the VICP will continue to serve as a successful alternative to the tort system.

Acknowledgments

I thank Ward Sorensen, Tamara Overby, and Linda Rozzelle (Division of Vaccine Injury Compensation, Healthcare Systems Bureau, Health Resources and Services Administration, US Department of Health and Human Services) and Elizabeth H. Saindon, Emily Marcus Levine, and David E. Benor (Office of General Counsel, US Department of Health and Human Services) for their assistance in preparing the manuscript.

Potential conflicts of interest. G.E. is an employee of the US Department of Health and Human Services; he receives no financial support nor does he have financial interest in domestic or international vaccine companies.

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(pg.
1
-
40
[erratum: MMWR Recomm Rep 2004; 53:743]
41
American Jobs Creation Act of 2004, Public Law 108–357, § 889–890
,
2004
42
Public Law 109-148, Division C
,
2005
43
Moss
R
Presentation at the Barriers to Immunization Workshop
,
2005
April
29
Washington, DC

Figures and Tables

Figure 1

Claims filed against US manufacturers of diphtheria and tetanus toxoids and pertussis vaccine and diphtheria and tetanus toxoids and acellular pertussis vaccine. **Denotes lawsuits alleging the development of autism (or other neurodevelopmental disorders) as a result of administration of vaccines, as of December 2004. Data are from the Division of Vaccine Injury Compensation, Health Resources and Services Administration, US Department of Health and Human Services.

Figure 1

Claims filed against US manufacturers of diphtheria and tetanus toxoids and pertussis vaccine and diphtheria and tetanus toxoids and acellular pertussis vaccine. **Denotes lawsuits alleging the development of autism (or other neurodevelopmental disorders) as a result of administration of vaccines, as of December 2004. Data are from the Division of Vaccine Injury Compensation, Health Resources and Services Administration, US Department of Health and Human Services.

Table 1

Status of the National Vaccine Injury Compensation Program, as of 31 May 2005.

Table 1

Status of the National Vaccine Injury Compensation Program, as of 31 May 2005.

Viewpoints expressed in this article do not necessarily represent the views of the Department of Health and Human Services.