In this summary of postlicensure safety surveillance for varicella vaccine,
Wise and colleagues report that 6574 cases of adverse events in recipients
of varicella vaccine were reported to the US Vaccine Adverse Event Reporting
System between March 17, 1995, and July 25, 1998, a rate of 67.5 reports per
100,000 doses sold. Approximately 4% of reports described serious adverse
events, including 14 deaths, but a vaccine etiology for most of these serious
events could not be confirmed.