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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 ]
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 ]
1984 – First vaccine for chicken pox; 1985 – First vaccine for Haemophilus influenzae type b (HiB) 1989 – First vaccine for Q fever [12] 1990 – First vaccine for hantavirus hemorrhagic fever with renal syndrome; 1991 – First vaccine for hepatitis A [13] 1998 – First vaccine for Lyme disease; 1998 – First vaccine for rotavirus [14]
Most children today receive the chickenpox vaccine as a routine part of childhood immunizations. Solidcolours/E+ via Getty ImagesIn July 2021, a Centers for Disease Control and Prevention ...
Classic explanations include yellow fever, bubonic plague, influenza, smallpox, chickenpox, typhus, and syndemic infection of hepatitis B and hepatitis D: 1,143,000–3,429,000 (estimated 30–90% of population) [67] [68] 1629–1631 Italian plague (part of the second plague pandemic) 1629–1631 Italy Bubonic plague: 1 million [69]
Chicken pox can cause up to 500 itchy blisters that dry up and form scabs in four or five days, the CDC says. It can be particularly serious in babies, adults and people with weak immune systems.
Pox parties, also known as flu parties, are social activities in which children are deliberately exposed to infectious diseases such as chickenpox.Such parties originated to "get it over with" before vaccines were available for a particular illness or because childhood infection might be less severe than infection during adulthood, according to proponents.
The name of the family, Poxviridae, is a legacy of the original grouping of viruses associated with diseases that produced poxes on the skin.Modern viral classification is based on phenotypic characteristics; morphology, nucleic acid type, mode of replication, host organisms, and the type of disease they cause.