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Smallpox was an infectious disease caused by variola virus (often called smallpox virus), which belongs to the genus Orthopoxvirus. [7] [11] The last naturally occurring case was diagnosed in October 1977, and the World Health Organization (WHO) certified the global eradication of the disease in 1980, [10] making smallpox the only human disease to have been eradicated to date.
Chickenpox. Chickenpox, also known as varicella ( / ˌvɛrəˈsɛlə / VER-ə-SEL-ə ), is a highly contagious, vaccine-preventable disease caused by the initial infection with 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 ...
The disease is caused by Orthopoxvirus monkeypox, formerly "monkeypox virus", [3] a zoonotic virus in the genus Orthopoxvirus. The variola virus, which causes smallpox, is also in this genus. [1] Human-to-human transmission can occur through direct contact with infected skin or body fluids, including sexual contact. [1]
Varicella zoster virus. Varicella zoster virus ( VZV ), also known as human herpesvirus 3 ( HHV-3, HHV3) or Human alphaherpesvirus 3 ( taxonomically ), is one of nine known herpes viruses that can infect humans. It causes chickenpox (varicella) commonly affecting children and young adults, and shingles (herpes zoster) in adults but rarely in ...
May 23, 2023 at 9:26 AM. Mpox (previously known as monkeypox) dominated headlines last summer, as the virus that causes distinct lesions slowly spread across the country—and the world. While the ...
6,400 (with chickenpox) [ 5] Shingles, also known as herpes zoster, is a viral disease characterized by a painful skin rash with blisters in a localized area. [ 2][ 6] Typically the rash occurs in a single, wide mark either on the left or right side of the body or face. [ 1] Two to four days before the rash occurs there may be tingling or local ...
Rickettsialpox is a mite-borne infectious illness caused by bacteria of the genus Rickettsia (Rickettsia akari). [1] Physician Robert Huebner and self-trained entomologist Charles Pomerantz played major roles in identifying the cause of the disease after an outbreak in 1946 in a New York City apartment complex, documented in "The Alerting of Mr. Pomerantz," an article by medical writer Berton ...
The history of smallpox extends into pre-history. [ 1] Genetic evidence suggests that the smallpox virus emerged 3,000 to 4,000 years ago. [ 2] Prior to that, similar ancestral viruses circulated, but possibly only in other mammals, and possibly with different symptoms. Only a few written reports dating from about 500 AD to 1000 AD are ...