Recent outbreaks of the chickenpox among vaccinated children suggest a need for a second vaccine in order to preserve immunity.
As reported by NPR: "A study that measured antibodies and the disease history of more than 200 kids found that two doses of vaccine was 98 percent effective in preventing chicken pox compared with 86 percent for a single dose. The results appear in the latest issue of the Journal of Infectious Diseases."
If you have any questions, call Passport Health or your child's pediatrician. Passport Health Northern Ohio actively carries the chickenpox vaccine.
Source: NPR.org
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