The main modes of transmission of novel coronaviruses are respiratory droplet transmission and close contact. Generally the effective distance of droplet transmission is in 1-2 meters. If the distance from the neighbor’s window is more than 5 meters, opening the window does not have much effect. In addition, the condition of the neighbors is also important. If the neighbors are normal healthy people, there is no risk to open the windows. If the neighbors have quarantined patients, try not to open the windows. Content source: Dr. You Lai