What are the side effects of the 2009 H1N1 vaccine?
The side effects of the 2009 H1N1 vaccine are expected to be the same as those typically associated with the seasonal flu vaccine. The side effects of the flu shot are: • Soreness, redness, or swelling where the shot was given • Fever (low grade) • Aches If these problems occur, they begin soon after the shot, are usually mild, and usually last 1 to 2 days. Almost all people who receive influenza vaccine have no serious problems from it. However, on rare occasions, flu vaccination can cause serious problems, such as severe allergic reactions.
