Airborne transmission—Look how a South Korean high school student became infected after **5 minutes of exposure from >20 feet away**. We cannot keep using the 6-feet (2 m) standard of social distance
to keep people safe. Indoor dining not safe! #COVID19 https://www.latimes.com/world-nation/story/2020-12-09/five-minutes-from-20-feet-away-south-korean-study-shows-perils-of-indoor-dining-for-covid-19

2) Mask and airborne science compilation video

3) Great thermal imaging videos on airborne aerosols. https://www.washingtonpost.com/investigations/2020/12/11/coronavirus-airborne-video-infrared-spread/?arc404=true

4) VENTILATION is key. Both ventilation and masks needed to reduce risk indoors. But most buildings not ventilated well enough.

5) Masks and aerosols demo

6) How is aerosol different from large droplets? aerosol study indicates that coronavirus is persistent and stable up to 16 hours in stagnant air. Typical air exchange every 20 min to 4 hrs, depending on ventilation. #COVID19

7) Now that aerosol transmission of the coronavirus is established, we need to both mask and disperse aerosols quickly. Key is ventilation. Japan assumed it was airborne from the very beginning. Hence their mask culture and focus on air flow. #COVID19