President Joe Biden on Thursday will announce a vaccine mandate for all federal employees and contractors as coronavirus infections rise in the U.S., according to a source who spoke with CNN.

Biden alluded to the announcement Tuesday when he spoke to reporters after delivering an address at the Office of the Director of National Intelligence.

“We have a pandemic because of the unvaccinated, and they’re sowing enormous confusion. And the more we’ve learned about this virus and the delta variant, the more we have to be worried and concerned. There’s only one thing we know for sure: If those other … people got vaccinated, we’d be in a very different world,” the President said.