Are there any side effects from the hepatitis A vaccine?
Contracting hepatitis A is more dangerous than any side effects from the vaccine. Though allergic reactions are possible, the hepatitis A vaccine generally only causes mild side effects; they usually last only one or two days.
- Up to 17 percent of kids will experience redness, swelling, or warmth near the shot site.
- Up to 8 percent will experience loss of appetite.
- Up to 4 percent will experience headaches.
As with any vaccine, severe allergic reactions are rare, but possible. If you notice your child having difficulty breathing, hoarseness or wheezing, hives, paleness, weakness, dizziness, or a rapid heartbeat shortly after receiving a shot, call your doctor right away.