Transmission pair information.

a M: male; F: female. b D: donor, LR: virologically linked recipient. c Fiebig stage: Fiebig stage of the recipients at the time of enrollment into the IAVI protocol C early infection study, when plasma was first collected for viral sequence analysis. d pVL: Plasma viral loads for the recipients are shown at the time of screening prior to enrollment into the IAVI protocol C early infection study, when R880F was at Fiebig stage III and R463F at Fiebig stage IV. The plasma viral load in R463F at Fiebig stage V was 3,980,000 copies/ml. Plasma viral loads in the donors are shown at the timepoint when the recipients were at Fiebig stage III/IV. Transmission pair information.