The same hotel has been confirmed, but how long have different buildings been isolated?

This situation has been isolated for at least 14 days, and now it needs 14+7 days.

According to the incubation period of diseases caused by COVID-19, the centralized isolation observation period of close contacts is 14 days after the last contact with cases and asymptomatic infected persons without effective protection. It is suggested that close contacts should be monitored at home for 7 days after the expiration of isolation period to avoid the spread of a few cases with long incubation period. The medical observation period and centralized isolation period of close contacts are determined according to the nucleic acid detection results of close contacts.

Coronavirus is a large virus family, which is known to cause colds and serious diseases such as Middle East Respiratory Syndrome (MERS) and Severe Acute Respiratory Syndrome (SARS). Novel coronavirus is a new coronavirus strain, which has never been found in human body before.