Currently, there is no claim that wearing sweaters is more likely to attract viruses. Generally the smoother the clothing, the more likely the virus will survive. Viruses have a relatively short survival time on woolen clothing. Woolen clothing on if there is no close contact with others, the possibility of transmitting the virus is less. Compared to what to wear on the way back, more attention should be paid to the protection work on the way, try to avoid close contact with others and wear a mask correctly to reduce the possibility of infection in small groups and reduce the chance of virus transmission.