Susceptibility of sheep to experimental co-infection with the ancestral lineage of SARS-CoV-2 and its alpha variant

Natasha N. Gaudreault, Konner Cool, Jessie D. Trujillo, Igor Morozov, David A. Meekins, Chester McDowell, Dashzeveg Bold, Mariano Carossino, Velmurugan Balaraman, Dana Mitzel, Taeyong Kwon, Daniel W. Madden, Bianca Libanori Artiaga, Roman M. Pogranichniy, Gleyder Roman-Sosa, William C. Wilson, Udeni B.R. Balasuriya, Adolfo García-Sastre, Juergen A. Richt