WebApr 7, 2009 · Smallpox is an infectious disease caused by the variola virus. It is characterized by fever, a general feeling of ill health (malaise), headaches and back pain. These initial symptoms are followed by a rash and small, raised bumps or lesions (pocks) within two or three days. Smallpox was a highly contagious disease, but was declared … WebSmallpox, one of the biggest killers in history, is caused by a virus called variola. Variola causes a distinctive rash and is often lethal. The name variola comes from the Latin word for “spotted” and refers to the raised bumps that appear on the face and body of infected individuals. Although similar in name and in the formation of a rash ...
Smallpox (for Parents) - Nemours KidsHealth
WebNov 17, 2024 · What is smallpox caused by? Smallpox is caused by the variola virus. This virus belongs to the same genus ( Orthopoxvirus) as the one that causes monkeypox. Can humans survive... WebSmallpox can be spread from person to person when the rash appears and until the scabs fall off. Causes. Smallpox is caused by the variola virus. The virus can spread: Directly from person to person. You can catch the smallpox virus by being around someone who has it. An infected person can spread the virus when they cough, sneeze or talk. signs for cruise cabin doors
Smallpox: Causes and Risk Factors - Verywell Health
WebSmallpox Causes. The variola virus causes it. There are two forms of the virus. The more dangerous form, variola major, led to smallpox disease that killed about 30% of people … WebOrthopoxvirusis a genus of virusesin the family Poxviridaeand subfamily Chordopoxvirinae. Vertebrates, including mammals and humans, and arthropodsserve as natural hosts. There are 12 species in this genus. Diseases associated with this genus include smallpox, cowpox, horsepox, camelpox, and monkeypox. WebMar 22, 2024 · Smallpox is a contagious and sometimes fatal disease caused by two related viruses: variola major and variola minor. Variola major is the more common and severe form, with an overall historical fatality rate of about 30%. Variola minor is less common and causes a milder form of smallpox that is usually not fatal. signs for early pregnancy