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.
1. How effective is the 2018 flu shot? Early findings from Canada indicate a 17 percent effectiveness against the viral strain, known as H3N2, thatâs been the main culprit of flu in the U.S. this winter. 2. Why are vaccines less protective against some strains of the flu? One reason has to do with the most-common way flu shots are made.