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),...
$169 bn for 29,000 lives? Study calculates cost of US shutdowns
Credit: Pixabay/CC0 Public Domain There's little doubt that government-ordered business shutdowns to stop the spread...