I think you’ve posted enough on a sensitive health topic in a difficult time that you should either post credentials, not comment so frequently as if an authority, or end your comments either saying you are or are not a doctor. It’s to a point where I think admins should nuke these threads. I’m an MD anesthesiologist at an academic center where we have been trialing NO for about a month on these patients - see that wasn’t that hard.

Edit: and just to add, credentials are to make the audience aware of the context and bias of the presenter, not to validate them. A virologist, biochemist, infectious disease specialist, nutritionist, epidemiologist, public health employee, and undergrad aspiring biology major have different perspectives and understanding of the domains involved. Witholding that context (with hostility) should always be suspect.