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.
The time of effectiveness on vaccines is a controversial issue. Some believe that vaccines in fact can last the entire dog's life. But it's recommended to get yearly boosters on most vaccines, 3-year booster on some rabies vaccines, and 6-month boosters on certain bordatella vaccines. If it's not required, then I wouldn't worry about it since it's only been about 3-4 months.