TABLE 1.

Numbers of sequences produced during this study for each HIV-1 subtype and recombinant and unclassifiable strains for each time period

Sample period	Region(s) sequenced	No. of sequences that were:
		Subtype A	Subtype D	Subtype C	Unclassifiable	Recombinant	Total
1981-1984	gag only	0	0	1	1	NAa	2
	env only	0	0	2	0	NA	2
	gag and env	1	1	3	2	0	7
	Total	1	1	6	3	0	11
1986-1989	gag only	1	2	32	1	NA	36
	env only	0	1	17		NA	18
	gag and env	2	3	103	2	4	114
	Total	3	6	152	3	4	168

^aNA, not applicable.