Skagit Valley Chorale outbreak (Washington, US) super-spreader event at rehearsal where 1 index case spreads COVID-19 to 53 of 61 members in attendance via inhalation of respiratory aerosols generated while singing.
Miller, Shelly l., Nazaroff, William W. et al. 2020. “Transmission of SARS‐CoV‐2 by inhalation of respiratory aerosol in the Skagit Valley Chorale superspreading event.” International Journal of Indoor Environment and Health, 2020;00:1–10.