Early days of the Covid research - my niece is on a study team at our University. The problems are knowing who will respond, at what point to try it, and ramping up the supply chain if it works.
Sue

Here is more info regarding Nitric Oxide and treatment for Covid. https://www.beyondair.net/news-media/press-releases/detail/122/beyond-air-approved-to-initiate-clinical-study-at-150-ppm