حلقة 7 يوليو 2020

Surfaces vs. droplets vs. aerosols

239 scientists have signed a letter urging the World Health Organization to warn people about airborne transmission of the coronavirus. Professor Jose-Luis Jimenez, who helped write the letter, explains. Transcript at vox.com/todayexplained. Learn more about your ad choices. Visit podcastchoices.com/adchoices