The effectiveness of 2 doses of varicella vaccine in the first 2.5 years after recommendation of a routine second dose of the vaccine for children is excellent. Odds of developing varicella were 95% lower for children who received 2 doses compared with 1 dose of varicella vaccine.

Even in an area in which Lyme disease is endemic, the risk of infection with B. burgdorferi after a recognized deer-tick bite is so low that prophylactic antimicrobial treatment is not routinely indicated.

No abstract