Burkitt lymphoma is the most aggressive type of lymphoma, which is a cancer that begins in cells of the immune system. It is more common in equatorial Africa than in Western countries. In Uganda, for example, the estimated prevalence of Burkitt lymphoma is between 5 and 20 cases per 100,000 inhabitants, whereas in the United States, according to NCI’s statistical database for 2001-2009, prevalence was 0.4 cases per 100,000 inhabitants…
U.S. health officials say last year was the worst ever for West Nile virus deaths. The final tally reported Monday was 286 deaths - or two more than the record set in 2002. But there were far fewer illnesses overall, and fewer serious cases than in previous years. The Centers for Disease Control and Prevention had predicted it would be a bad year because of weather conditions that promote breeding of the mosquitoes that spread the virus to people. The CDC report Monday showed Texas had nearly a third of the serious cases, and about a third of the deaths. West Nile virus was first diagnosed in Uganda in 1937, but no cases were reported in the U.S. until 1999 in New York. It gradually spread to the West Coast.source : http://www.foxnews.com/health/2013/05/14/deaths-from-west-nile-virus-hit-record-last-year/