Ryan's District Boards

<p><a href="http://news.yahoo.com/polio-vaccine-developer-koprowski-dies-022153503.html"><img src="http://l3.yimg.com/bt/api/res/1.2/oCc2IUHli3nxxOcWASL5Zg--/YXBwaWQ9eW5ld3M7Zmk9ZmlsbDtoPTg2O3B4b2ZmPTUwO3B5b2ZmPTA7cT04NTt3PTEzMA--/http://media.zenfs.com/en_us/News/ap_webfeeds/aab21f868e41fb0c2e0f6a70670047db.jpg" width="130" height="86" alt="FILE - This Feb. 1961 file photo show Dr. Hilary Koprowski. Dr. Hilary Koprowski, a pioneering virologist who developed the first successful oral vaccination for polio, died Thursday, April 11, 2013 at his suburban Philadelphia home. He was 96. (AP Photo/File)" align="left" title="FILE - This Feb. 1961 file photo show Dr. Hilary Koprowski. Dr. Hilary Koprowski, a pioneering virologist who developed the first successful oral vaccination for polio, died Thursday, April 11, 2013 at his suburban Philadelphia home. He was 96. (AP Photo/File)" border="0" /></a>PHILADELPHIA (AP) â€" Dr. Hilary Koprowski, a pioneering virologist who developed the first successful oral vaccination for polio, died this week at his suburban Philadelphia home. He was 96.</p><br clear="all"/>