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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 ]
Human infectious diseases may be characterized by their case fatality rate (CFR), the proportion of people diagnosed with a disease who die from it (cf. mortality rate).It should not be confused with the infection fatality rate (IFR), the estimated proportion of people infected by a disease-causing agent, including asymptomatic and undiagnosed infections, who die from the disease.
is the average number of people infected from one other person. For example, Ebola has an of two, so on average, a person who has Ebola will pass it on to two other people.. In epidemiology, the basic reproduction number, or basic reproductive number (sometimes called basic reproduction ratio or basic reproductive rate), denoted (pronounced R nought or R zero), [1] of an infection is the ...
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.
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 ]
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.
Varicella (chickenpox) and herpes zoster (shingles) 0.2: 0.03% ... can and are often used to investigate underlying causes of deaths such as for mortality statistics ...
Varicella voster infection- chickenpox, shingles, and unspecified Chickenpox: Chickenpox (regional) Chickenpox (i.e., varicella) - morbidity and deaths only Chikungunya fever: Chikungunya fever: Chikungunya fever: Human coronavirus with pandemic potential (COVID-19/SARS-CoV-2) COVID-19: Dengue fever: Dengue fever: Dengue fever: Dengue fever ...