In this instance the infected person was the airport worker. So wouldn't that help limit transmission? And you also agree already that it reduces hand to face

In this instance the infected person was the airport worker. So wouldn't that help limit transmission? And you also agree already that it reduces hand to face contact, further helping limit transmission. Also, it's not as clear-cut to say they do not help prevent spread. Doing a quick search and picking the very first article from https://scholar.google.com/scholar?hl=en&as_sdt=0%2C5&q=face+masks+influenza https://scholar.google.com/scholar?hl=en&as_sdt=0%2C5&q=face... says this: > Hand hygiene and facemasks [vs just hand hygiene, or nothing] seemed to prevent household transmission of influenza virus when implemented within 36 hours of index patient symptom onset. These findings suggest that nonpharmaceutical interventions are important for mitigation of pandemic and interpandemic influenza.