Sources

References:
1."Update: Influenza Activity." //MMWR Weekly// 1009-1012 (18 Sept. 2009). //CDC National Website//.  Web. <[]>. 2.Recurring Norovirus Outbreaks in a Long-Term Residential Treatment Facility." //MMWR Weekly// 1009-1012 (3 July 2009). //CDC National Website//. Web. <[]>.