4 definitions of HPR. Definition of HPR in Business & Finance. What does HPR stand for?
According to the Centers for Disease Control (CDC), you should allow two weeks after getting a flu shot to develop protection against the flu. That's because after vaccination, the body has to work for a while to create the protective antibodies to the flu virus. Bear in mind, though, that there's a lot of variation in how fast different people's immune systems work.
Other possible side effects -- including cough, fever, aches, headache and fatigue -- are similar to flu symptoms, although they are typically less severe. Side effects are usually mild, begin shortly after the injection and last 1 or 2 days. Severe allergic reactions occur in less than 1 in 1 million people receiving a flu shot, according to the Centers for Disease Control and Prevention. Allergic reactions are more common in people with an egg allergy.