Efficacy and Safety of Molnupiravir in Healthy Participants Inoculated With Experimental Influenza Virus (MK-4482-019)

Four molnupiravir 200 mg capsules (800 mg total dose) taken twice daily by mouth.

Four placebo capsules matched to molnupiravir taken twice daily by mouth.

Placebo capsule matched to oseltamivir taken twice daily by mouth.

One capsule of oseltamivir 75 mg taken twice daily by mouth.

Influenza A challenge virus given once by intranasal administration at an inoculum concentration of between approximately 5 and 7 Log10 tissue culture infective dose 50% (TCID50/mL).