Smallpox has been one of the most dangerous and deadly curses’ ever placed on humankind. Even illnesses as terrible as the plague, cholera, and yellow fever have not had such a universal effect. Smallpox is a parasitic virus (a virus destructive to the host) called variola. It’s considered to be a “crowd disease�, spreading only through people and requiring a large densely populated area to survive. If the virus is cut off from new host bodies it dies out. Smallpox is spread by what is called “droplet infection.� “Droplets†....