Table 1. Participants contributing specimens for UL39 genotyping¹.

Continent	Persons2	Sex			HIV-1 infection
		Men	Women	Unknown	Positive	Negative	Unknown
Prior reports3
North America	9	2	5	2	1	6	2
South America
Africa4	16	4	8	4	5	8	3
Asia	8			8			8
unknown	8			8			8
subtotal	41	6	13	22	6	14	21
Newly reported
North America	46	22	24		9	37
South America	50	19	30	1	33	17
Africa	56	26	30		37	19
subtotal	152	67	84	1	79	73
All reported
North America	55	24	29	2	10	43	2
South America	50	19	30	1	33	17
Africa	72	30	38	4	42	27	3
Asia	8			8			8
unknown	8			8			8
Total	193	73	97	23	85	87	21

¹Each individual with UL39 genotyping information is listed only once regardless of the presence or absence of detection of dual strain infection.

²No entry is made for values of zero participants in the indicated demographic groups.

³Includes laboratory strain HG52, 333, and 186, strains SD90e and SD66¹⁵, and strains from Brandt et al.¹⁶.

⁴Includes strains SD90e and SD66.