Secondhand smoke is not a mode of droplet transmission, but it is important to keep a certain distance from each other when smoking to avoid potential transmission. According to current knowledge, coronavirus is mainly spread by respiratory droplet transmission, contact transmission, secondhand smoke is not a respiratory droplet. However, some smokers often get together to smoke, and if they smell obvious smoke, it means that the two are close together. If people with novel coronavirus pneumonia have unprotected gatherings to smoke and talk, this may lead to droplet transmission or contact transmission, and this risk needs to be avoided. People should also maintain a safe distance of 1 meter or more when smoking.