I've never been an assertive or forward person, but I may have to put my foot down with something that has come up. I invited a dear friend (ex-neighbor) to visit us at our new home (been here two years already, but never had a chance to have her over before). She is 70+ and said she feels safe in small crowds and is fully vaccinated.

Man. I hate to disinvite her, but if protein shedding is a real thing, I'd rather not have her visit and I will tell her as much.

Is it something to really be concerned about?