Two discharged patients in the north China port city Tianjin were tested positive again for the novel coronavirus on Thursday while under isolation, and were transferred to the city's Haihe Hospital for observation and treatment.

One of the patients was discharged on February 13 and was then put under medical observation at an isolation observation point in Heping District. The other was discharged on February 11, and was isolated at a medical facility in Baodi District.