Final answer:
The second dose of the varicella vaccine is typically given between 4 to 6 years for children under 13, with a minimum spacing of 3 months after the first dose; for those 13 and older, it is administered at least 4 weeks after the first dose.
Step-by-step explanation:
The second dose of the varicella vaccine is recommended to be administered between 4 to 6 years of age for children under 13 years of age. However, it can be given at any time after the first dose as long as it is at least 3 months apart from the first. For those aged 13 years and older, the second dose should be administered at least 4 weeks after the first dose.
Varicella, also known as chickenpox, is a common childhood illness that can lead to shingles later in life if the virus reactivates. It is important to follow the immunization schedule provided by health organizations such as the CDC to prevent these diseases and their potential complications.