Powerful HIV prevention: few seroconversions were observed1

Seroconversions from baseline to ≥96 weeks1,2

Suspected baseline infections: 1 (DESCOVY) and 4 (FTC/TDF)

Seroconversions at other timepoints2,3

  • Primary endpoint analysis: 7 (DESCOVY) vs 15 (FTC/TDF)
    • Primary analysis: when 100% of participants reached Week 48 and ≥50% reached Week 96
  • Baseline to ≥144 weeks analysis:
    • 2 additional seroconversions occurred in the DESCOVY arm (n=2070)
    • 1 additional seroconversion occurred in the initially assigned FTC/TDF arm (n=2115)
  • Median intracellular drug levels were substantially lower in participants infected with HIV-1 at the time of diagnosis vs uninfected, matched control participants. Values for 1 participant in the DESCOVY arm are not available

Counsel individuals to strictly adhere to the one tablet, once-daily dosing schedule, as efficacy is strongly correlated with adherence.2

*Seroconversion was observed in 1 person in the FTC/TDF arm with missing DBS sample at the visit of HIV-1 diagnosis; a DBS sample collected 7 weeks prior to the diagnosis showed TFV-DP levels indicating high adherence at that time.4

The efficacy of DESCOVY is strongly correlated to adherence to daily dosing.2

DBS=dried blood spot; fmol=femtomole; FTC/TDF=emtricitabine/tenofovir disoproxil fumarate; TFV-DP=tenofovir diphosphate.