WebJun 28, 2016 · Smallpox is an ancient disease caused by the variola virus. Early symptoms include high fever and fatigue. The virus then produces a characteristic rash, particularly on the face, arms and legs. The resulting spots become filled with clear fluid and later, pus, and then form a crust, which eventually dries up and falls off. Smallpox was fatal ... WebSmallpox is caused by a virus and can result in one of two forms of the disease, called variola major and variola minor. Variola major kills 20 to 40 percent of unvaccinated people who get it and can lead to blindness. Variola minor, a far less lethal form of the disease, results in death only on rare occasions.

Smallpox - WHO

WebNov 17, 2024 · Smallpox, a deadly and highly contagious disease caused by a virus, was eradicated in the late 1970s after global vaccination efforts. Its telltale symptom is a red … WebSmallpox is an acute contagious disease caused by the variola virus. It gets its name from the Latin word for "spotted," referring to the raised, pustular bumps that break out over the face... onward plush

22.3: Viral Infections of the Respiratory Tract - Biology LibreTexts

WebOne of the first methods for controlling smallpox was variolation, a process named after the virus that causes smallpox (variola virus). During variolation, people who had never had smallpox were exposed to material … WebMar 6, 2024 · Because the smallpox variola virus only infects humans, it was a good target for eradication. Human-to-human transmission could be interrupted through targeted vaccination campaigns. Similarly, poliovirus, which also only infects humans, was eliminated in 193 countries. WebDec 11, 2014 · Smallpox, caused by the variola virus, was a highly contagious infectious disease that caused infected individuals to develop a fever and a progressive, disfiguring skin rash. Three of out 10 individuals … onward processing中文