Second-hand smoke from a patient with a new crown can be infectious. Because the new coronavirus is particularly contagious, but also through the respiratory tract, droplets and aerosols to spread, the new coronavirus may also be carried in the smoke exhaled by the new coronavirus patients, so inhaling the second-hand smoke of the new coronavirus patients may be infected, especially when the new coronavirus patients coughing, coughing sputum and other phenomena that occur when smoking, the probability of being infected will be higher, so try to keep a safe distance from the new coronavirus patients. Generally diagnosed with the new crown virus infection will be sent to a designated hospital for isolation and treatment, patients try not to smoke, drink, which is not conducive to the recovery of the disease, in public places need to wear a good mask to avoid infecting other people. If you feel unwell, you should take good personal protection measures, go to the hospital in time and consult a specialist for guidance.