Fig. 1.
Concentrations of TFV and FTC in blood plasma, cervicovaginal fluid, and semen. (A to C) Median concentrations (ng/ml) of the ART drugs TFV and FTC in (A) blood plasma, (B) cervicovaginal fluid, and (C) seminal plasma for 14 days after a single dose of a TDF/FTC drug combination (vertical lines representing interquartile ranges). Samples were analyzed by liquid chromatography and mass spectroscopy methods.