Hello Doctor, I am aware of an earlier advisory on avoiding home AC usage owing to the current COVID-19 pandemic outbreak and we are practicing the same too, so as an alternative we plan to use an exhaust fan placing it in a way to blow the external cool air inwards of our apartment during night hours especially during the current summer times when indoor temperatures stay warmed up during night hours to fetch a better night time sleep, please advise if this practice runs the risk of bringing in the coronavirus infected air molecules into our home... Furthermore, my apartment lays three storeys above the ground level and there are no building structures surrounding us, I await an early response from you in this regard.. Thank you..