What is the primary method of post-exposure prophylaxis for Hepatitis A?

The primary method of post-exposure prophylaxis for Hepatitis A is vaccination. The Hepatitis A vaccine is highly effective in providing immunity when administered within two weeks following exposure to the virus. This is because the vaccine works by stimulating the body's immune response to produce antibodies against the virus, thereby preventing the onset of the disease.

In cases where an individual has been exposed to Hepatitis A—such as through close contact with an infected person or consumption of contaminated food or water—administering the vaccine can significantly reduce the risk of developing Hepatitis A infection. It is a proactive approach and is often recommended for people who are at risk following exposure.

Other options, while they may have their own roles in managing or preventing diseases, do not serve as a primary method of post-exposure prophylaxis for Hepatitis A. Medication and therapy generally refer to treatment after the infection has occurred rather than prevention, and monitoring does not actively prevent disease transmission or development in the event of exposure.