The State of Connecticut has recently updated the state vaccine requirement, and effective August 1, 2011, all children born on or after January 1, 2007 who are enrolled in Pre-School or Kindergarten must show proof of having received two doses of Hepatitis A vaccine given at least six months apart. The Hepatitis A vaccine is given as a two dose series starting on or after 12 months of age. The two doses must be at least six months apart. This vaccine is given during routinely at checkups, usually at 12 and 18 months of age. If you have any questions, please let us know.