I hate to interject a serious note into this thread: I believe that most wind instruments are also to have bell covers, in addition to the individual musician masks.
I'm following this fairly closely as I'm a member of one of the oldest community bands in the US. We're trying to figure out if we can restart at some point or if 189 years of continuous performance is at an end. (Fingers are crossed that we can figure something out that meets COVID safety criteria, but allows for the continuation of our tradition.
I don't know of any reputable scientist or Doctor who thinks it is a "cure." It is at best merely a treatment to decrease the symptoms of the disease for some people and that's okay, or should be if it wasn't so politicized.