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 first dose protects your body (for the short-term) in an estimated two to four weeks. Once you receive the second dose (about six to 12 months after the first), the vaccine should work for at least 20 years. Studies estimate, however, that the vaccine may last over the course of your lifetime.