Not mentioned in the article: <i>In the 20th century alone, experts estimate, it took up to a half billion lives, more than all the wars and epidemics put together.</i> [1]<p>Think about that: it killed more than WWI and WWII and all other 20th century wars <i>combined</i>.<p>[1] <a href="https://www.nytimes.com/1999/06/15/science/smallpox-the-once-and-future-scourge.html" rel="nofollow">https://www.nytimes.com/1999/06/15/science/smallpox-the-once...</a>