TABLE 1.

Numbers of patients exhibiting various DV IgM-positive reactivity patterns and IgG avidity, segregated by age group and place of patient residence

Age group (yr)	No. of patients with indicated reactivity pattern (avidity) residing in:
	Caribbean islands			U.S. mainland
	IgM+IgG−	IgM+IgG+ (low)	IgM+IgG+ (high)	IgM+IgG−	IgM+IgG+ (low)	IgM+IgG+ (high)
≤20	280	34	233	95	28	54
21–40	114	8	199	155	76	140
41–60	65	10	220	132	86	211
>60	38	15	158	32	30	120
Total	497	67	810	414	220	525