Researchers have detected tiny airborne particles containing RNA from SARS-CoV-2, the virus that causes COVID-19, both inside and outside of rooms in which infected people were self-isolating at home. This finding suggests that airborne transmission beyond the isolation rooms in homes may pose a risk of infection to other home occupants. The study, in Annals of the American Thoracic Society, is the first report of household air contamination with SARS-CoV2 RNA under typical daily living conditions when a household member is infected. Airborne transmission in crowded living conditions may be one reason for higher rates of COVID-19 infection among people with lower incomes. “Risk of infection from larger respiratory droplets that rapidly settle onto surfaces, typically within two meters of the source, can be reduced by hand-washing, social distancing, and face masks, but the tiny respiratory particles that stay suspended in air for hours, require air filtration, ventilation, or better masks for prevention,” said …