Asymptomatic infection means no clinical symptoms but positive pathogenic test for novel coronavirus in respiratory specimens. For the public how to deal with asymptomatic infection cases, should do the following: 1, the best self-protection method is to properly wear a mask, hand washing, home diligent wipe disinfection, diligent window ventilation; 2, reduce close contact with others, the best to maintain a distance of 1-2 meters, avoid sharing items; 3, the new coronavirus is highly contagious, there is the phenomenon of human-to-human transmission, should do to use separate dishes, 56 ℃ above Boil and scald for 30 minutes.