Has there been any significant progress for making indoor spaces safer by treating air? While spring and summer will alleviate some of the risk by having people outdoors more, there are still places like gyms, grocery stores, etc. that are indoors. I'm fully vaccinated, but the particular idea of going back to my weightlifting gym seems slightly risky to me, mostly from the thought of being indoors where people are heavily breathing (I'm not concerned about touching equipment... that can be sanitized and I can wash my hands).
