Table 1. Genetic variation between mother and infant in epidemiologically linked transmission pairs.

Patient ID	Subject	Months post-birtha	No of sequences	No of unique haplotypes	Diversity (%)b	dN/dSc	Median length (range) of V1-V5	Median PNGS (range) of V1-V5
1449	Mother Infant	N/A 2	37 26	37 21	6.13±2.72 0.48±0.15	0.77 0.71	337 (327–340) 330	23 (19–27) 21 (18–21)
2669	Mother Infant	N/A 2	32 30	32 29	3.16±0.90 0.71±0.29	0.83 0.54	340 (331–347) 339 (335–339)	26 (22–29) 25 (23–25)
2873	Mother Infant	N/A 2	31 29	30 26	5.25±2.25 0.60±0.28	0.81 0.91	352 (334–356) 356	26 (23–28) 28 (27–29)
2617	Mother Infant	N/A 2	27 27	26 27	0.77±0.23 0.63±0.32	0.59 0.52	338 (336–341) 336	24 (23–25) 23 (22–24)
1984	Mother Infant	N/A 4	30 25	29 25	2.53±1.4 1.11±0.43	0.88 0.89	339 (336–345) 343	24 (22–26) 21 (19–22)
1084	Mother Infant	N/A 6	41 25	27 25	5.35±3.1 1.38±0.47	0.98 0.62	333 (326–334) 319 (319–328)	23 (19–26) 21 (19–23)

^aMaternal samples at delivery were defined as baseline and infant baseline samples were referred to the first postpartum HIV-1 PCR positive time point as indicated in months.

^bStandard deviations for genetic diversity are indicated.

^cdN/dS calculated after screening for recombination.

N/A means that this category is not applicable to maternal subjects.