Rose DeVore with and 4 others at Violet Township, Fairfield County, Ohio. 1  Jimmy Lee Frazier II at Violet Township, Fairfield County, Ohio. 1  Carey Frazier was watching Game of Thrones at  2  Jimmy Lee Frazier II at  3  Bunny Rickenbacker at
1 Understand that hepatitis B vaccination-induced protective antibodies can last for up to 15 years, but appear to fall off over time.2  Patients who were vaccinated 10 to 15 years ago, especially those who were vaccinated as children, may not be adequately protected. Patients who were vaccinated 10 to 15 years ago, especially those who were vaccinated as children, may not be adequately protected. 2  For patients with this history who are at moderate to high risk of hepatitis B infection consider quantitative hepatitis B antibody measurement to determine protective immunity.
How long your own flu shot lasts depends on how powerfully your own immune system reacts to it, said Dr. John J. Treanor, a vaccine expert at the University of Rochester medical school. In a young, healthy person, protection might last for years, even as circulating flu strains change. Conversely, he said, there is some debate about whether older people or those with compromised immune systems ought to get two flu shots per season, since a shot they got in October may wear off by March or April.