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28 lut 2022 · Smallpox was a severe disease that caused distinctive pustules. It was an epidemic that caused many deaths, but the first vaccine helped eliminate it.
28 cze 2016 · The virus which causes smallpox is contagious and spreads through person-to- person contact and saliva droplets in an infected person’s breath. It has an incubation period of between 7 and 17 days after exposure and only becomes infectious once the fever develops.
Smallpox is an infectious disease that is caused by the variola virus. It spreads from one person to another, either directly or indirectly. The variola virus infects only humans — other animals are unable to catch smallpox.
Smallpox is an acute contagious disease caused by the variola virus, a member of the orthopoxvirus family. It was one of the most devastating diseases known to humanity and caused millions of deaths before it was eradicated. It is believed to have existed for at least 3000 years.
5 sie 2022 · Smallpox is a serious and often deadly viral infection. It's contagious — meaning it spreads from person to person — and can cause permanent scarring. Sometimes, it causes disfigurement. Smallpox has affected humans for thousands of years but was wiped out worldwide by 1980 thanks to smallpox vaccines.
11 paź 2024 · Smallpox is caused by infection with variola major, a virus of the family Poxviridae. (A less-virulent form of smallpox, called alastrim, is caused by a closely related virus known as variola minor.) There are no natural animal carriers nor natural propagation of variola outside the human body.
Smallpox killed some 300 million people worldwide in the 20th century before it was eradicated in 1977. Today the biggest threat from smallpox comes from its possible use as a bioterrorism...
