Lessons from Smallpox Guide Polio Endgame<p><a href="http://news.yahoo.com/lessons-smallpox-guide-polio-endgame-114200110.html"><img src="http://l.yimg.com/bt/api/res/1.2/lLu6uUq_0l._2HimUSd8_w--/YXBwaWQ9eW5ld3M7Zmk9ZmlsbDtoPTg2O3E9ODU7dz0xMzA-/http://media.zenfs.com/en_us/News/ScientificAmerican/ImagePolioCornered.jpg" width="130" height="86" alt="Lessons from Smallpox Guide Polio Endgame" align="left" title="Lessons from Smallpox Guide Polio Endgame" border="0" /></a>Lessons from Smallpox Guide Polio Endgame</p><br clear="all"/>
Source: Lessons from Smallpox Guide Polio Endgame (http://news.yahoo.com/lessons-smallpox-guide-polio-endgame-114200110.html)