At least one Greek Orthodox is requiring parishes to place signage on its doors to the effect that by voluntarily entering the person is acknowledging that doing so is not risk-free and that they might contract COVID 19 or some other disease and therefore will hold the parish harmless.
Now that only slows down a lawsuit by a few seconds...about as effective as a cloth mask against a microscopic virus.
Yes; in my area in NJ the first suit would be brought by some imports claiming they couldn’t read it in the language in which it is written (and they’d win).