What should I look for?

Any unusual condition, such as a serious allergic reaction, high fever or unusual behavior. Serious allergic People should not get hepatitis B vaccine if they have ever had a life-threatening allergic reaction to baker’s yeast (the kind used for making bread) or to a previous dose of hepatitis B vaccine. People who are moderately or severely ill at the time the shot is scheduled should reactions are extremely rare with any vaccine. If one were to occur, it would be within a few minutes to a
few hours after the shot. Signs can include difficulty breathing, hoarseness or wheezing, hives, paleness, weakness, a fast heart beat or dizziness.

What should I do?

• Call a doctor or get the person to a doctor right away.
  
• Tell your doctor what happened, the date and time it happened, and when the vaccination was given.
  
• Ask your doctor, nurse, or health department to file a Vaccine Adverse Event Reporting System (VAERS) form, or call VAERS yourself at 1-800-822-7967