Aerosols and Droplets: Covid-19, 2020
What to believe?
“You need a mask.” – early March 2020
“Masks are for medical professionals only.” – a few days later in March, 2020
“You don’t need a mask.” – two weeks later, later March 2020
“The CDC recommends that every person in the US wears a covering when out in public.” – early April 2020
NO […]