Health / Smallpox Complete GuideSmallpox is caused by infection with the variola virus. The virus can be transmitted directly from person to person but requires prolonged face-to-face contact.Reference Smallpox Complete Guide |
Health / Smallpox Complete GuideSmallpox is caused by infection with the variola virus. The virus can be transmitted directly from person to person but requires prolonged face-to-face contact.Reference Smallpox Complete Guide |