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.
According to the CDC, the most common flu vaccine side effect is a sore arm where you got your flu shot. Children and others who have never before had the vaccine may have some fever, muscle aches, or other flu-like symptoms after vaccination. These symptoms can begin as soon as six to 12 hours after vaccination and last for one or two days.