As we continue to learn more about the COVID-19 pandemic and how the disease spread, it has now been recognized and acknowledged by CDC1 and WHO2 that aerosol transmission in poorly ventilated indoor environments may play a significant role. Aerosols are respiratory droplets (5 µm). If aerosols contain the virus in sufficient quantity a susceptible person could inhale them and become infected. While the infectious dose of SARS-CoV-2 is currently unknown data is available for other respiratory viruses.
