when would a child most likely receive their first vaccination?

a) at the hospital when they are born
b) at their three-month checkup
c) at age two during a well child visit
d) at age four before the beginning of school

The correct answer is b) at their three-month checkup. The Centers for Disease Control and Prevention (CDC) recommends the first dose of the hepatitis B vaccine to be given to infants shortly after birth, but the first round of routine childhood vaccinations (including DTaP, IPV, Hib, PCV13, and rotavirus) are typically given at the 2-month, 4-month, and 6-month checkups, with some vaccines starting as early as 6 weeks old.