![]() From the introduction of the smallpox vaccine in 1796, it took nearly two centuries to eradicate the disease. Smallpox was declared eradicated in 1980 while rinderpest, a deadly virus in cattle, was eradicated in 2011. ![]() There are only two viruses ever to be eradicated in human history: smallpox (variola virus) and rinderpest virus. Tab will move on to the next part of the site rather than go through menu items.Įradicating diseases caused by viral pathogens on a global scale is no easy task. Enter and space open menus and escape closes them as well. Up and Down arrows will open main level menus and toggle through sub tier links. ![]() ![]() Left and right arrows move across top level links and expand / close menus in sub levels. The site navigation utilizes arrow, enter, escape, and space bar key commands. ![]()
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