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.
The flu vaccine can't give you the flu, experts say. The flu shot uses virus heated to 165 degrees to keep it from reproducing. Mild symptoms lasting just a day are the result of the body's immune system revving up.