Riediker, M., L. Briceno-Ayala, G. Ichihara, D. Albani, D. Poffet, D.-H. Tsai, S. Iff, and C. Monn. “Higher Viral Load and Infectivity Increase Risk of Aerosol Transmission for Delta and Omicron Variants of SARS-CoV-2”. Swiss Medical Weekly, vol. 152, no. 0102, Jan. 2022, p. w30133, doi:10.4414/SMW.2022.w30133.