VE = (ARU - ARV) / ARU * 100%
with
VE = Vaccine Efficacy
ARU = Attack rate of unvaccinated people
ARV = Attack rate of vaccinated people
VE = (ARU - ARV) / ARU * 100%
with
VE = Vaccine Efficacy
ARU = Attack rate of unvaccinated people
ARV = Attack rate of vaccinated people