The novel coronavirus has an incubation period, and in most cases the disease will develop 3-7 days after infection with the novel coronavirus, and as late as about 14 days. Most people show symptoms such as fever and cough at the beginning of the illness, then it will progress towards pneumonia with symptoms such as respiratory distress. For patients with low immunity, such as those with chronic diseases, elderly people, cancer patients, etc., it may cause complications of certain chronic diseases or acute respiratory distress syndrome, which may be life-threatening.