Doctors are finding that placing the sickest coronavirus patients on their stomachs — called prone positioning – helps increase the amount of oxygen that’s getting to their lungs.

“We’re saving lives with this, one hundred percent,” said Narasimhan, the regional director for critical care at Northwell Health, which owns 23 hospitals in New York. “It’s such a simple thing to do, and we’ve seen remarkable improvement. We can see it for every single patient.”

“Once you see it work, you want to do it more, and you see it work almost immediately,” added Dr. Kathryn Hibbert, director of the medical ICU at Massachusetts General Hospital…

Now they’ve doubled down on this with coronavirus patients, and it’s paying off. When the patient at Long Island Jewish was placed on his stomach, his oxygen saturation rate, a measure of oxygen in the blood, went from 85% to 98%, a huge jump.

Update, 4/15: CNN originally had “back” instead of “stomach” in the fourth paragraph, but fixed it later.