Smallpox

Smallpox is an infectious disease caused by the variola virus, and is known for its ability to cause severe illness and death in some cases. Smallpox was a major cause of death and disability in humans until the early 20th century, when a vaccine was developed that prevented the virus from spreading and helped to eradicate the disease entirely. In recent years, smallpox has been used in both medical and biological research to understand the immune response to other viruses and the effects of modern antiviral treatments. Smallpox has been studied extensively as a potential bioterrorism agent and is considered a dangerous risk to public health. Vaccination is the only method of preventing infection and is highly recommended for individuals who are at risk of exposure to the virus.