Figure 2: Geographic distribution of babesiosis and Lyme disease in the United States. (a) Reported cases of at least one case of babesiosis in 22 of the 27 different states that conducted surveillance: white = 0 cases; yellow = 1–5 cases; orange = 6–10 cases; brown = 11–20 cases; and dark brown > 20 cases. Babesiosis was not a reportable disease in the gray states, and health departments in those states did not notify CDC of cases [6]. (b) Reported cases of Lyme disease across the United States. Each blue dot represents a confirmed case [7].