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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] It usually starts on the ...
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.
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]
Chicken pox is an illness caused by the varicella zoster virus, according to the Centers for Disease Control and Prevention. It causes a distinct itchy, blister-like rash that usually shows up on ...
Not included in the above table are many waves of deadly diseases brought by Europeans to the Americas and Caribbean. Western Hemisphere populations were ravaged mostly by smallpox, but also typhus, measles, influenza, bubonic plague, cholera, malaria, tuberculosis, mumps, yellow fever, and pertussis. The lack of written records in many places ...
Chicken pox. What it looks like: ... What it looks like: Fifth Disease is caused by Parvovirus B19 and presents with a red rash on the cheeks, arms, and legs that can last for several weeks. This ...
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.
For comparison, while it takes a tick carrying Lyme disease nearly 24 hours to pass the infection on to a human host, a tick with POW can transfer the virus in as little as 15 minutes.