This is interesting to read now, because at the time (March 2020) I was watching Drs from Italy on YouTube saying that they recommended hi-flow O2 and proning with surgical masks on the patient. I remember this because I researched whether it would be worthwhile buying O2 cylinders or a generator, concluding : no, because it would be hard to produce the necessary flow with available equipment. Somehow this memo didn't make it out to the wider medical community it appears.