Efficacy of face masks to prevent respiratory virus
transmission: abridged secondary publication
BJ Cowling, DK Ip, HL Yen
School of Public Health, The University of Hong Kong, Hong Kong
1. Various respiratory viruses can be detected in
exhaled breath of patients with acute respiratory
infections.
2. Viral loads are greatest in those with influenza virus infection.
3. We did not identify a significant effect of surgical face masks in reducing the amount of respiratory virus detected in coarse or fine particles in exhaled breath.
2. Viral loads are greatest in those with influenza virus infection.
3. We did not identify a significant effect of surgical face masks in reducing the amount of respiratory virus detected in coarse or fine particles in exhaled breath.