How many days has the secret contact in Zhenhai, Ningbo been isolated?

14 days. Close contacts in Zhenhai, Ningbo were isolated 14 days. Close contact refers to close contact with infectious virus carriers. At this time, there is a great risk of infection, which requires medical observation for a certain period of time, and individuals should also take protective measures during isolation. In addition, when in close contact at home, the home environment requires isolation requirements.