Figure 4

Monthly malaria incidence during different time periods in Hainan, China. The peak period occurred between May and October, during which nearly 70% of the annual malaria cases were reported. The month with the lowest malaria incidence was February during the 1995-2000 period and January during the 2001-2008 period, whereas the highest malaria incidence was reported during the month of August for both of these periods.