Novel coronavirus pneumonia is highly contagious and close contacts are recommended to be isolated for observation, the time needed for isolation and observation depends on the incubation period. The incubation period for novel coronavirus pneumonia is 2-14 days, which means that close contacts are recommended to be isolated for 14 days. If a confirmed infected person is exposed and does not show symptoms for 14 days, he or she may be considered free of infection and may be released from isolation. If another infected person is contacted within these 14 days, or if a single room is not isolated during the isolation period, for example, if a group of people living together is diagnosed within these 14 days, other family members should be isolated for another 14 days starting from the day the newly diagnosed case is confirmed. The requirement for the period of isolation should be properly understood as being based on the longest incubation period developed, counting from the time of last contact with the last confirmed infected person. If after 14 days there are no symptoms and the nucleic acid test is negative, the quarantine can be lifted. Content source: Dr. You Lai