Infectious virus in exhaled breath of symptomatic seasonal influenza cases from a college community

There is little prior data on influenza virus shedding into, and the infectiousness of exhaled aerosols, contributing to uncertainty about the importance of airborne influenza transmission. We screened 355 volunteers with acute respiratory illness and report 142 cases with confirmed influenza infection who provided 218 paired nasopharyngeal (NP) and 30-minute breath samples (coarse >5 um and fine