As COVID cases are spiking again in New York and other cities, CNN has gone back to the future.

The cable net told the staff that the building is once again closed to all nonessential workers.

Only employees who must work onsite will be allowed in US offices and must be masked up, CNN President Jeff Zucker said in a memo to workers.

“We are doing this out of an abundance of caution,” Zucker said in the memo, which was shared with Reuters. “And it will also protect those who will be in the office by minimizing the number of people who are there.”

CNN has required proof of vaccination for in-office and in-the-field workers, and the station fired three employees last summer – while the return to the office was voluntary — for going to work without having been jabbed.

Zucker said at the time that the company has a “zero-tolerance policy” about people coming to work unvaccinated.

Just last week, CNN announced that they were planning to host their New Year’s Eve show live from Times Square.