The varicella-zoster virus is one of the human herpes viruses; when a person first contracts the virus, infection leads to chicken pox. The varicella vaccine can help lower the risks of contracting this common childhood illness.

Effects

Between 80 and 90 percent of people who receive the varicella vaccination become completely protected from the varicella-zoster virus, according to the Centers for Disease Control and Prevention.

Significance

Even some people who are vaccinated against varicella-zoster virus ultimately contract the virus. However, the CDC reports that these people generally have less severe symptoms than people who have not been vaccinated.

Time Frame

Two doses of varicella vaccine are recommended by the CDC and the American Academy of Pediatrics. Medline Plus reports that these should be given during childhood, once at 12 to 15 months and again at 4 to 6 years.

Older People

Adolescents and adults who were never vaccinated can still receive the vaccine in two doses four to eight weeks apart, according to Medline Plus.

Considerations

Common side effects of the varicella vaccine include fever, injection site reaction (pain and swelling) and rash; rare complications include seizure, pneumonia and severe allergic reaction, according to Medline Plus. A doctor can help decide if another condition interferes with a person's ability to be vaccinated against varicella.

Source:

Centers for Disease Control and Prevention: Varicella (Chickenpox) Vaccination

Medline Plus: Chickenpox Vaccine