Maybe one of the media outlets, for example CNN, made it up. Then another outlet picked it up saying, according to CNN’s reporting… Then someone else goes further and says according to the White House reported. The media makes things up all the time. Unless it is an official White House declaration I don’t believe anything.
And it would be completely wrong, as well as terminally stupid, for Meadows to say anything to any media without clear authorization from POTUS either directly or through doctor.