So far, eight people out of the thousands who visited the park this summer have been infected with the mouse-borne virus, which has no known cure.img width='1' height='1' src='http://rss.nytimes.com/c/34625/f/640346/s/23370ee0/mf.gif' border='0'/br/br/a href="http://da.feedsportal.com/r/144540218982/u/0/f/640346/c/34625/s/23370ee0/a2.htm"img src="http://da.feedsportal.com/r/144540218982/u/0/f/640346/c/34625/s/23370ee0/a2.img" border="0"//aimg width="1" height="1" src="http://pi.feedsportal.com/r/144540218982/u/0/f/640346/c/34625/s/23370ee0/a2t.img" border="0"/