Vaccine injury | |
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Classification and external resources | |
ICD-10 | T88.1, Y58-Y59 |
ICD-9-CM | E948, E949 |
A vaccine injury is an injury caused by vaccination.
Allegations and confirmed instances of vaccine injuries in recent decades have appeared in litigation in the United States. Some families have won substantial awards from sympathetic juries, even though many public health officials have said that the claims of injuries are unfounded. In response, several vaccine makers stopped production, threatening public health, and laws were passed to shield makers from liabilities stemming from vaccine injury claims.
All vaccines may have side effects. Although almost all side effects are minor, immunization safety is a real concern. Unlike the case with most other medical interventions, vaccines are given to healthy people, which is why some people are far less willing to tolerate adverse effects of vaccines than adverse effects of other treatments. As the success of immunization programs increases and the incidence of disease decreases, public attention shifts away from the risks of disease to the risk of vaccination.
Concerns about immunization safety often follow a pattern. First, some investigators suggest that a medical condition of increasing prevalence or unknown cause is due to an adverse effect of vaccination. The initial study, and subsequent studies by the same investigators, have inadequate methodology, typically a poorly controlled or uncontrolled case series. A premature announcement is made of the alleged adverse effect, which resonates with individuals suffering from the condition and which underestimates the potential harm of not being vaccinated. The initial study is not reproduced by other investigators. Finally, it takes several years before the public regains confidence in the vaccine.
Controversies in this area revolve around the question of whether the risks of adverse events following immunization outweigh the benefits of saving people from tragic outcomes of common diseases. There is some scientific evidence that immunizations can cause serious adverse effects, such as gelatin measles-mumps-rubella vaccine (MMR) causing anaphylaxis, a severe allergic reaction. Allegations particularly focus on disorders claimed to be caused by the MMR vaccine and thiomersal, a preservative used in vaccines routinely given to U.S. infants prior to 2001. Current scientific evidence does not support claims of vaccines causing the various disorders cited in the claims.