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Chickenpox, also known as varicella (/ ˌ v ɛ r ə ˈ s ɛ l ə / VER-ə-SEL-ə), is a highly contagious disease caused by varicella zoster virus (VZV), a member of the herpesvirus family. [ 3 ] [ 7 ] [ 5 ] The disease results in a characteristic skin rash that forms small, itchy blisters , which eventually scab over. [ 1 ]
The varicella vaccine is 85% effective at preventing varicella (chickenpox) infection. [9] However, 75% of individuals that are diagnosed with breakthrough varicella exhibit milder symptoms than individuals that are not vaccinated. [5] These individuals with mild varicella have low fevers, fewer than 50 lesions on their skin, and a ...
It takes 10 to 21 days after exposure to develop symptoms and it lasts about 5–10 days. For the most part, getting the chickenpox provides immunity for life. Although uncommon, it is possible for some people to get chickenpox more than once. [44]
The chickenpox vaccine is a success story, “one in which the U.S. pioneered,” said Dr. William Schaffner, a professor of infectious disease at the Vanderbilt University Medical Center.
Varicella vaccine, also known as chickenpox vaccine, is a vaccine that protects against chickenpox. [9] One dose of vaccine prevents 95% of moderate disease and 100% of severe disease. [ 10 ] Two doses of vaccine are more effective than one. [ 10 ]
The vaccines are up to 89% effective at preventing lung infections like pneumonia in the first RSV season after someone is vaccinated, the CDC says. RSV vaccine side effects in older adults
Fact: There is a vaccine that can prevent mpox, but the CDC recommends that only certain people who are at high risk should get it. The vaccine, JYNNEOS, is given in two doses at least 28 days apart.
A zoster vaccine is a vaccine that reduces the incidence of herpes zoster (shingles), a disease caused by reactivation of the varicella zoster virus, which is also responsible for chickenpox. [8] Shingles provokes a painful rash with blisters, and can be followed by chronic pain ( postherpetic neuralgia ), as well as other complications.