Just to remind everyone what we are dealing with here: http://en.wikipedia.org/wiki/History_of_smallpox http://en.wikipedia.org/wiki/History_of_smallpox Duri

Just to remind everyone what we are dealing with here: http://en.wikipedia.org/wiki/History_of_smallpox http://en.wikipedia.org/wiki/History_of_smallpox During the 20th century, it is estimated that smallpox was responsible for 300–500 million deaths. Half a billion people dead, after a vaccine was discovered. And that was one century of the 12,000 years it has existed. That's why I get shivers from the opening of http://en.wikipedia.org/wiki/Smallpox http://en.wikipedia.org/wiki/Smallpox: Smallpox *was* an infectious disease... [...] To this day, smallpox is the only human infectious disease to have been completely eradicated.