Does the hepatitis A vaccine provide lifelong immunity?

People's understanding of vaccines is often one-sided, and many people believe that a single vaccination can provide lifelong immunity. There is indeed such a vaccine, which only needs to be taken once in a lifetime, and then you don't have to worry about contracting this disease. But some vaccines have a time limit. It may be effective for three years, or five years, and you still need to get another shot after that. So, does the hepatitis A vaccine provide lifelong immunity?

Although the hepatitis A vaccine can play a preventive role for a long period of time, it should not be mistakenly believed that the vaccine provides lifelong immunity. The immune ability may be reduced due to various factors such as physical deterioration. Therefore, friends who have been vaccinated with the hepatitis A vaccine should not think that they can be immune for life. They should still pay more attention to their lifestyle to avoid hepatitis A infection and prevent the occurrence of liver disease.

Hepatitis A is an acute intestinal infectious disease caused by hepatitis A virus. Unlike hepatitis B, hepatitis A is a self-limiting disease that generally presents as an acute process and does not develop into chronic hepatitis or chronic carriers. Hepatitis A is mainly transmitted through the fecal-oral route and is prone to outbreaks.

my country is a high-incidence area of ​​hepatitis A, and the infection rate of hepatitis A virus is very high. Children are easily infected when they encounter hepatitis A virus because their immunity is not very perfect. Therefore, the harm of hepatitis A cannot be ignored, and the prevention and treatment of hepatitis A should be strengthened. Vaccination with hepatitis A vaccine is one of the most effective measures.

Generally speaking, if you are not feeling unwell and have no history of other serious illness, you can be vaccinated without being examined. People who have been infected or have had hepatitis A do not need to be vaccinated again.

Four groups of people are not suitable for hepatitis A vaccination: those with fever or axillary temperature exceeding 37.5℃; those with acute infectious diseases or other serious diseases; those with immunodeficiency or who are receiving immunosuppressant treatment; and those with allergic constitution.

Experts pointed out that hepatitis A and hepatitis B are completely different things. Hepatitis B or hepatitis B virus carriers do not affect the vaccination of hepatitis A vaccine. Both chronic hepatitis B patients and hepatitis B virus carriers can be vaccinated, but in principle they cannot be injected with "live attenuated vaccines." To ensure safety, people with hepatitis B or hepatitis B virus carriers can have further liver function tests before vaccination, and they can safely receive the hepatitis A vaccine if their liver is not damaged.

To sum up, the hepatitis A vaccine does not provide lifelong immunity and needs to be taken regularly. I hope this can help everyone, and I also hope that you will pay attention to this issue.