No LFT no visit purely on her attitude. What has she read, false news wise, to make her go against the grain?
The tests often show false results when they are not taken properly. It has to make you gag so that you have reached the active parts and should make you sneeze. Most of our germs are in the nose.
We have to use them prior to a dental visit, going to see vulnerable people and when going into company not often seen. No one objects, it's a reality of current Life-style. Quite frankly, if she refuses then she wouldn't be visiting without a mask! However, we all carry strepB and salmonella in our noses, as well as MRSA - all biggies when the immune system is low.
It's not when you test positive but how soon after catching a virus that it gets passed on. Even after testing negative we are still able to pass it on ............