What Is the Shingles Vaccine?
The
shingles vaccine (
Zostavax®) is a single-dose vaccine used to prevent shingles in people 60 years old and older. It is not used to treat an active case of shingles.
Who Makes the Shingles Vaccine?
The shingles vaccine is made by Merck & Co., Inc.
How Does the Shingles Vaccine Work?
Shingles is caused by a virus, the varicella-zoster virus (VZV). The initial infection of varicella-zoster virus causes a case of
chickenpox. After the case of chickenpox, the virus never goes away. It remains inactive in certain nerve cells of the body, waiting to become active again (which usually occurs as people age and their immune systems are less able to suppress the virus). The shingles vaccine is a live (but weakened) version of the varicella-zoster virus. The shingles vaccine causes the body to produce an immune system response to the virus, which helps prevent shingles.