This is an open-label study in which all participants know the investigational substance being tested. Participants will be inoculated in the nose with HRV-16 and evaluated for the occurrence of cold symptoms and other indicators. There will be 3 phases: a screening phase, an HRV-16 infection phase, and a follow-up phase. The dose of virus being tested in this study has been previously used in other challenge studies. The total length of participation in the study will be about 4 weeks. Participant safety will be monitored.