Ellen DeGeneres Tests Positive for COVID-19

Ellen DeGeneres has tested positive for coronavirus, but says, so far, she feels okay ... but she wants to give everyone she's been in close contact with a heads up.

The talk show host revealed her diagnosis Thursday morning and says she's following all the proper CDC guidelines. It sounds like she's going to be taking a break from work, because she adds ... "I'll see you again after the holidays. Please stay healthy and safe."

As for the guests she's had in studio in the last week -- Justin Bieber, Bryan Cranston, Diane Keaton, Alison Brie and Lil Nas X.

It's been a rough stretch for Ellen the past several months. We broke the story ... her Montecito mansion with Portia de Rossi was burglarized in July, which led to a serious security upgrade at the home.

Around the same time ... several ex-employees of "The Ellen DeGeneres Show" alleged a toxic work environment, for which she later apologized.