(CNN)Legendary talk show host and former CNN interviewer Larry King has Covid-19, according to a source close to the family.

King, 87, has been hospitalized at Cedars Sinai Medical Center in Los Angeles for more than a week, the source said. Due to protocols at the hospital, King's three sons have been unable to visit him, according to the source.

King, who has Type 2 diabetes, has confronted a series of medical issues over the years, including several heart attacks and quintuple bypass surgery in 1987. In 2017, King revealed he had been diagnosed with lung cancer and successfully underwent surgery to treat it. He also underwent a procedure in 2019 to address angina.

His own medical issues inspired him to start the Larry King Cardiac Foundation, a non-profit aimed at helping those without health insurance afford medical care.

King hosted CNN's "Larry King Live" for 25 years, interviewing presidential candidates, celebrities, athletes, movie stars and everyday people. He retired in 2010 after taping more than 6,000 episodes of the show.

But he couldn't stay off the airwaves for long.