There is no clear medical answer as to how long it takes to spread with a person with novel coronavirus. But through the current research know that the new coronavirus from the infection of the human body to the appearance of symptoms is about 3-7 days on average, short can be 1 day onset, long can also be 14 days onset, so the designated medical isolation observation period is 14 days. If there is suspicion of contact with the infected area or contact with people from Wuhan, Hubei, at least 14 days of home observation is required. If there are no symptoms occurring during this period, it means that they are not infected. If any relevant symptoms appear, you should go to the hospital promptly. The average observation period is currently considered to be 3-7 days, and the isolation period should be set at 14 days.