@DrEricDing 4·î6Æü AIRBORNE RESTAURANT TRANSMISSION—3 families— ¡¦¡¦¡¦³ä°¦¡¦¡¦¡¦ 9) Now that aerosol transmission of the coronavirus is established, we need to disperse aerosols quickly. Key is ventilation. ÆüËÜ assumed it was airborne from the beginning. Here is how to ventilate your school classrooms if unable to open window. #COVID19