For the traditional route of the new coronavirus, the current consensus achieved in the medical community is respiratory droplet transmission, contact transmission. Previously, a team has been found in the feces of the new coronavirus, Zhong Nanshan academician that the new coronavirus is not necessarily spread through the digestive tract infection, but also due to the drying of pollutants in the sewer, the virus and through the air, aerosol transmission, people inhaled to cause infection, so keep the sewer is usually more important.