Final answer:
The first dose of Hepatitis B (HBV) vaccine is given shortly after birth, and the second and third doses are given at 1-2 months and 6-18 months of age, respectively.
Step-by-step explanation:
The first dose of Hepatitis B (HBV) vaccine is given shortly after birth, usually within 24 hours. This initial dose helps provide immediate protection for infants who may be at risk of exposure to the virus. The second dose is typically given at 1-2 months of age, and the third dose is given at 6-18 months of age. These subsequent doses help to strengthen and extend the immune response to HBV, providing long-term protection.