Study registration: *
Publication Chemaitelly H, medRxiv, 2021
Dates: 2021-02-01 to 2021-07-21
Funding: Mixed (The Biomedical Research Program, the Biostatistics, Epidemiology, and Biomathematics Research Core, and the Genomics Core, all at Weill Cornell Medicine-Qatar, as well as the Ministry of Public Health, Hamad Medical Corporation and the Qatar Genome Programme.)
Conflict of interest: no COI (The authors have declared no competing interest.)