The linked site appears to be down, which is definitely not making this seem more trustworthy.
EDIT: I guess that’s just one random site with the press release.
Interestingly, the clinical trial seems to be pre-registered: https://clinicaltrials.gov/ct2/show/NCT04443868 Not sure how much I should infer from that about how good it was.
That’s a piece of evidence that there even was a real clinical trial and not random lies typed onto the internet. So maybe there is something here. I’m just noting the inverse—if this worked, was it always this easy? The flu and the cold have taken away a lot of lives and caused bad periods in countless more. All it took was huffing some toxic gas as a spray?