Table 1.

Clinical data for HIV-1-infected patients

Patient	Isolate	Virus phenotype*	CD4 count†	AIDS onset, mo‡	Death, mo‡
A	J2195	NSI	600	+55	+71
	J4052	SI	260	+35	+52
B	J562	NSI	250	+4	+25
	J975	SI	110	−4	+17
C	J669	NSI	320	+11	+66
	J1629	SI	210	−4	+51
D	J1874	NSI	360	—§	—§
	J2337	SI	410	—§	—§
E	J2090	NSI	50	+10	+31
	J2822	SI	20	+4	+25
F	J2234	NSI	310	+24	+43
	J4996	NSI	190	−3	+16
G	J1228	NSI	320	+9	+41
	J4482	NSI	5	−26	+6
H	J624	NSI	290	+27	+42
	J3899	NSI	6¶	−14	+1

Virus isolates obtained sequentially with (i) switched phenotype from NSI to SI (patients A–E) and (ii) maintained NSI phenotype despite AIDS (patients F–H). Absolute counts of CD4⁺ lymphocytes were measured at time of virus isolation, and time span to onset of AIDS or death was calculated in relation to the time of virus isolation. 

^*Virus phenotype as classified by MT-2 assay. 

^†CD4⁺ lymphocyte count in cells/mm³. 

^‡Time span in months to the onset of AIDS or to death in relation to the time of the virus isolation; − before isolation; +, after isolation. 

^§Patient D had not developed AIDS and was alive at time of collection of clinical data. 

^¶Available CD4 count was measured 6 months before virus isolation.