Personally, I'm a bit skeptical about the idea of cannabis preventing Covid, but hey, stranger things have happened, right? I think it's always important to approach these kinds of studies with a critical eye and wait for more research to come out.
By the way, the link you mentioned seems to be missing, so if you're still on the hunt for info, I'd suggest looking at reputable sources like the CDC or WHO. They usually have the latest updates on Covid-related research.
Oh, and speaking of cannabis, I recently came across some cool facts about qualifying for medical cannabis on the
Releaf webpage. It seems like they have some really helpful info for anyone interested in exploring medical cannabis options.