What are the risks from chickenpox vaccine?
A vaccine, like any medication, is capable of causing serious problems, such as severe allergic reactions. The risk of chickenpox vaccine causing serious harm or death is very small. Most people who get the chickenpox vaccine do not have any problems with it. Problems may include: • soreness or swelling in the location where the shot was given • fever • mild rash, up to one month after vaccination Other problems such as low blood count, pneumonia, seizures, and severe brain reactions are very rare. Experts are not sure whether these are caused by the chickenpox vaccine or not.
