One doctor treating COVID-19 patients in New York says it was like altitude sickness. It was “as if tens of thousands of my fellow New Yorkers are stuck on a plane at 30,000 feet and the cabin pressure is slowly being let out. These patients are slowly being starved of oxygen,” said Cameron Kyle-Sidell, MD, an emergency room and critical care doctor at Maimonides Medical Center in Brooklyn who has been posting about his experience on social media.