At what age is the second dose of the varicella vaccine recommended?

The second dose of the varicella vaccine is recommended at ages 4 to 6 years. This timing is aligned with the routine vaccination schedule to ensure optimal immunity against chickenpox. Administering the vaccine during this age range helps to reinforce the immune response initiated by the first dose, which is typically given between 12 and 15 months of age. By ensuring that children receive the second dose before entering school, the likelihood of outbreaks and transmission of chickenpox in educational settings is significantly reduced.

This vaccination strategy reflects the need for protection as children grow, particularly as they engage more in social environments where the risk of exposure increases. The schedule is designed based on studies indicating that the second dose enhances overall immunity and is necessary for long-term protection against the disease.