This article is from the Childhood Vaccinations FAQ, by Lynn Gazis-Sax firstname.lastname@example.org with numerous contributions by others.
The NCVIA requires the reporting of any events in the Reportable
Events Table which occur within the time period specified and any
event listed in the manufacturer's package insert as a
contraindication to subsequent doses of the vaccine. A copy of the
Table can be obtained by calling 1-800-822-7967. Although NCVIA only
requires reporting of the events mentioned in the Table, VAERS
encourages all reporting of any clinically significant adverse event
occurring after the administration of any vaccine licensed in the
On average, about 17% of the reports reflect adverse events resulting
in life-threatening illness, hospitalization, permanent disability,
extended hospital stay or death. The remaining 83% of the reports
primarily describe events such as fever, local reactions transient
crying or mild irritability, and other less serious experiences.