Symptomatic and Asymptomatic Transmission of SARS-CoV-2 in K-12 Schools, British Columbia, Canada April to June 2021 за авторством Alexandra Choi, Louise C. Mâsse, Samantha Bardwell, Iryna Kayda, Yanjie Zhao, Yang Xin Zi Xu, Ani Markarian, Daniel Coombs, Adrienne Macdonald, Allison W. Watts, Nalin Dhillon, Michael Irvine, Collette O’Reilly, Pascal M. Lavoie, David M. Goldfarb