The Vaccine Assessment using Linked Data (VALiD) trial compared opt-in and opt-out parental consent for a population-based childhood vaccine safety surveillance program using data linkage. A subsequent telephone interview of all households enrolled in the trial elicited parental intent regarding the ret...
The vaccine we now use is the inactivated polio vaccine (IPV). It contains small amounts of the killed polio virus, and must be given in three separate doses given at 2, 4 and 6 months, followed by a booster dose at 4 years of age. The IPV may be combined with other vaccinations ...
Vicki Xafis1,2, Michael S Gold2, the Vaccine Assessment Using Linked Data (VALiD) Working Group2 Abstract Background: The Vaccine Assessment using Linked Data (VALiD) trial compared opt-in and opt-out parental consent for a population-based childhood vaccine safety surv...