Madonna is opening up about her experience with what she thought was "a very bad flu" before testing positive for coronavirus (COVID-19) antibodies.

The singer, 61, revealed she was sick while on her Madame X Tour in Paris seven weeks ago in an Instagram post on Wednesday.

"Im Grateful that I can be a part of supporting Research to Find the cure for Covid -19!! And just to clear things up for people who would rather believe sensationalist headlines than do their own research about the nature of this virus—I am not currently sick," she wrote in the caption, sharing a screenshot of a news article about research for a coronavirus vaccine.

"When you test positive for anti-bodies it means you HAD the virus which I. clearly did as I was sick at the end of my tour in Paris over 7 weeks ago along with many other artists in my show but at the time," she added. "We all thought we had a very bad flu. Thank God we are all healthy and well now."

Madonna continued, "Hope that clears things up for the band wagon jumpers!! Knowledge is Power! #covid19."

In late April, the pop star shared on her social media that she had tested positive for coronavirus antibodies in a video that she dubbed "Quarantine Diaries No. 14."

"I took a test the other day, and I found out that I have the antibodies," Madonna said in the noir-themed clip, in which she writes out some thoughts on a typewriter. She added that she plans to spend some time out of her house in light of the test results.

"So tomorrow I'm just going to go for a long drive in the car, I'm going to roll down the window and I'm going to breathe in the COVID-19 air. Yup. I hope the sun is shining," she said in the video.

The "Material Girl" hitmaker went over some other musings before concluding, "Here's the good news: tomorrow's another day and I'm going to wake up and I'm going to feel differently."