What is the main purpose of the Zostavax vaccine?

The main purpose of the Zostavax vaccine is to prevent shingles, which is caused by the varicella-zoster virus. This vaccine works by boosting the immune system's response to the virus, reducing the risk of developing shingles in individuals, particularly those aged 50 and older. Shingles, also known as herpes zoster, can lead to painful rashes and long-term nerve pain known as postherpetic neuralgia. By administering the Zostavax vaccine, healthcare providers aim to minimize these health complications associated with shingles and improve the overall quality of life for seniors.

The other options relate to different diseases that the Zostavax vaccine does not target. For instance, influenza is prevented by the flu vaccine, hepatitis A is covered by its dedicated vaccine, and meningitis prevention is addressed by vaccines specifically designed for that illness. Thus, the Zostavax vaccine's effectiveness is specifically focused on providing immunity against shingles.