Facemasks, Hand Hygiene, and Influenza among Young Adults: A Randomized Intervention Trial Aiello, Allison E. ; Perez, Vanessa ; Coulborn, Rebecca M. ; Davis, Brian M. ; Uddin, Monica ; Monto, Arnold S. Abstract Publication: PLoS ONE Pub Date: January 2012 DOI: 10.1371/journal.pone.0029744 Bibcode: 2012PLoSO...729744A