In recent days the US Vaccine Adverse Events Reports database (VAERS), opened a quarter of a century ago, was updated to top more than half a million reports. While listing on VAERS does not mean a vaccine injury report is confirmed it is also as a passive reporting database likely to under-report by many times and may represent numerically no more than 1 or 2% of cases.
Although monitored by both the Centers for Disease Control and the Food and Drug Administration it is doubtful whether the database has ever led to the official acknowledgment of any single injury. It may be that in one instance a product, Wyeth’s Rotashield, was removed from the market as a result of evidence from the database. On that occasion the removal of the product was greatly to the benefit of the nation’s leading vaccine advocate, Paul Offit, who was piloting a rival product. On other occasions VAERS data may have contributed modestly to policy changes which would anyway have occurred .