In 2012, Vigo County Schools in Indiana experienced an outbreak of chickenpox. Of the 92 reported cases of chickenpox, only 3 involved unvaccinated children. Ten of the children had received 1 round of chickenpox vaccine, and 79 had been fully vaccinated (2 rounds). So 86% were fully vaccinated, and 11% were partially vaccinated. 79 for 92. Hey, not bad. What bunk.