The Birkenhead television and radio star, who has suffered three heart attacks, is in the risk category recommended by the NHS.
But he revealed that he was treating the deadly virus with a homemade vinegar mixture.
The 64-year-old man told radio presenter Gaby Roslin, 55, that he had concoction of apple cider vinegar, garlic and four other herbs; rosemary, lemongrass, parsley and a bay leaf.
There is no evidence that it works and anyone with symptoms is encouraged to see a doctor.
Paul said, “I’m fine now. Last week, I had flu-like symptoms. I didn’t have a severe cough, I certainly didn’t have the temperature or something like that, so I just settled.
“It was then that the heater turned off, so it was minus two here and it was very cold and I thought someone had picked it up for me. I am fine now. “
The former drag queen has not been diagnosed with the virus, but believes he definitely has it.
The Daily Mail reports that Paul added, “Most definitely. It strikes, but there are also seasonal fluids and colds, so you have to tell yourself and learn the difference.
“The coronavirus … you know if you caught this. I lay on the couch with the fire lit and the dogs above me groaning.
“When you lie on the dying couch or think you are. It was a burnout like Chris Evans too. “
Paul admitted that he had prepared the vinegar solution himself, calling it Four Thieves Vinegar.
In his post, which was shared on BBC Radio 2’s Twitter account on Monday, the star said, “I only came back for a show after an absence and I’m leaving!
“But I am one of those people who fall into the category of underlying health conditions and that is because I have had heart attacks.
“I was strongly advised to isolate myself, so that’s exactly what I do. I’m in the Kent Desert with a very lively five-week-old puppy, so my hands are full and I have a lot to do, and I just want to say to everyone who is isolated – good luck and stay healthy and take care of yourself.
“And a big thank you to all the NHS members for everything they do. “
He added to his replacement Paddy O’Connell: “I will talk to all of you when this is all over, so be careful and Paddy again, thank you very much and have a great show. “