Table 1.

Classification of 74 Tanzanian villages using the criterion of failure to move to a lower WHO risk category as the definition of a persistent hotspot

		Prevalence in Year 4				Total
		≥ 50%	10–49%	3–< 10%	< 3%
Prevalence in Year 1	≥ 50%	7	30	6	–	43
	10–49%	0	10	17	–	27
	< 10%	0	0	2	2	4
Total		7	40	25	2	74

Persistent hotspots are indicated in boldface. WHO = World Health Organization.