20‐year‐old woman, patients 2–6: four women 42–57 years old  CT, RT‐PCR  Nasopharyngeal swabs  Patient 1: met with Patients 2 and 3, and accompanied five relatives (Patients 2–6), Patients 2–6: no visited Wuhan or been in contact with any other people traveled to Wuhan  Spectrum of disease: severe pneumonia: