Definition: The Hepatitis A vaccine, inactivated, also known as "inactivated Hepatitis A vaccine," is a type of hepatitis A virus vaccine that has been modified to reduce the risk of infection during the first injection. The Hepatitis A vaccine, inactivated, works by introducing the virus into your body via a small needle or a syringe. This means that you are not getting the virus directly from your bloodstream and can pass it on to others through other blood contacts such as sharing needles or drinks with infected individuals. The immune system in the liver becomes stronger after receiving the Hepatitis A vaccine, which is what helps your body fight off any potential infections. The vaccine is typically given every three years to protect against hepatitis A, though some people may be exempt from this requirement by living an inactive lifestyle such as not having sex for a long time or if they have had a liver transplant. The vaccination works well in most cases and can provide protection against several types of hepatitis A. The word "inactivated" is used to describe the vaccine in a way that makes it appear less active, suggesting that it has been modified or processed so that the virus doesn't replicate as much and thus requires fewer doses to be given. The term refers to how quickly the vaccine can be administered after being prepared for use, indicating its ease of use. In summary, the Hepatitis A vaccine inactivated is a type of vaccine used to protect against hepatitis A. It works by reducing the risk of infection during first injection and provides protection against several types of hepatitis A.