Free online tool calculates risk of COVID-19 transmission in poorly-ventilated spaces

Colorized scanning electron micrograph of a cell (blue) heavily infected with SARS-CoV-2 virus particles (red), isolated from a patient sample. Image captured at the NIAID Integrated Research Facility (IRF) in Fort Detrick, Maryland. Credit: NIAID The vital role of ventilation in the spread of COVID-19 has been quantified by researchers, who have found that in […]