What is the purpose of the varicella vaccine?

The primary purpose of the varicella vaccine is to prevent chickenpox and shingles. Chickenpox, caused by the varicella-zoster virus, is a highly contagious viral infection characterized by an itchy rash and flu-like symptoms. In individuals who have had chickenpox, the virus can remain dormant in the body and reactivate later in life, leading to shingles, which can cause a painful rash and other complications.

The varicella vaccine helps to induce immunity against the varicella-zoster virus, significantly reducing the incidence of chickenpox and the risk of developing shingles later on in life. By preventing these conditions, the vaccine contributes to improved public health outcomes by reducing the overall incidence of viral infections associated with varicella.

The other options focus on vaccines for different diseases: influenza, bacterial infections, and measles are all prevented by separate vaccines and are unrelated to the varicella vaccine's specific function. This clearly defines the distinct role of the varicella vaccine in immunization programs.