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Howard Stern fans can rest easy.

After taking a rare day off on Wednesday, Stern was back on the radio Monday morning to explain that he’s been sick with a fever and the flu.

“I don’t want to be here,” he said. “There was a lot of speculation, ‘Where was I on Wednesday?’ Many people pointed out that me taking what they call a ‘personal day,’ by the way, I never said ‘personal day.’ I didn’t take a personal day, I took a sick day and I’m still sick, you can still hear it in my voice.”

The 63-year-old SiriusXM host sent the internet into a frenzy when he unexpectedly went off the air last week with no explanation. Concerned fans, who claim Stern has never taken a day off work, took to social media to express their worries and theories about where he was.

“Why was it such a big deal that I took a f–king day off?” he said Monday. “I wanted to take off today because my voice is still shot, but I was afraid to. I felt so f–king guilty. I missed a day of work and all of a sudden it’s bigger news than James Comey.”

He continued, “These a——s started calling my mother’s house, what am I, 5? If I miss a day of work, you don’t call my mother, you call my wife, I’m married. They’re calling my mother to see why I’m missing school.”

On Friday, his wife, Beth Stern, confirmed to The Post, “Everything is great. He’s coming back on Monday. He had to take a personal day, that’s all.”