Table 1.

Sampled number of locations (L) and case reports (N), time range and summary statistics of estimated reporting probabilities (per capita method). (Sample coverage is limited for state WC case reports. US locations are sampled weekly; E&W cities are sampled every other week. CV, coefficient of variation.)

disease	area	L	N	start	end	mean	CV
measles	US cities	48	1148	5 Jan 1924	29 Dec 1945	0.27	0.55
measles	E&W cities	60	598	9 Jan 1944	25 Dec 1966	0.54	0.15
measles	US states	45	1089	7 Jan 1928	11 Dec 1948	0.20	0.51
WC	US cities	48	1148	5 Jan 1924	29 Dec 1945	0.10	0.71
WC	US states	46	467	1 Jan 1938	7 Dec 1946	0.06	0.67