A cluster-randomised controlled trial to test the efficacy of facemasks in preventing respiratory viral infection among Hajj pilgrims

by Wang, Mandy, Barasheed, Osamah, Rashid, Harunor, Booy, Robert, El Bashir, Haitham, Haworth, Elizabeth, Ridda, Iman, Holmes, Edward C., Dwyer, Dominic E., Nguyen-Van-Tam, Jonathan, Memish, Ziad A., Heron, Leon
Published 2014