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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 ]
Chicken pox has symptoms that change over time, with a rash that lasts about five to 10 days. The Mayo Clinic says that someone may have the following symptoms a day or two before the rash shows up:
Other symptoms to note: Chicken pox rashes typically start toward the middle of the body and work outward toward the extremities. It can often cause pockmarked scars after the blisters heal.
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.
Monkeypox and chickenpox can be confused with each other. Doctors break down how to tell monkeypox vs. chickenpox, plus what to do next. Monkeypox vs. Chickenpox: How to Tell the Difference
Chickenpox-like rashes were recognized and described by ancient civilizations; the relationship between zoster and chickenpox was not realized until 1888. [29] In 1943, the similarity between virus particles isolated from the lesions of zoster and those from chickenpox was noted. [30] In 1974 the first chickenpox vaccine was introduced. [31]
Dragon pox is a potentially fatal contagious disease that occurs in wizards and witches. Its symptoms are presumably similar to Muggle illnesses like smallpox and chicken pox. However, in addition to leaving the victim's skin pockmarked, dragon pox causes a lasting greenish tinge.
Cowpox is similar to, but much milder than, the highly contagious and often deadly smallpox disease. [5] Its close resemblance to the mild form of smallpox and the observation that dairy farmers [ 6 ] were immune to smallpox inspired the modern smallpox vaccine , created and administered by English physician Edward Jenner .