My family are testing before my Nan comes round for Christmas. She has recently been given the all-clear for cancer but it weakened her immune system and she also has heart problems. Covid has the potential to be fatal for her. She doesn't go out really as she doesn't want to be in crowds of coughing people, but my family are always out and about at various Christmas events this time of year.
It isn't an irrational phobia, my Nan has been told by her consultant that Covid would have a much harsher impact on her body than someone who is fit and healthy. People who have the privilege to say people just need to "get over" a virus which can be fatal for the vulnerable have no understanding other than what is in their own periphery, not everyone has the ability to go about as normal and "forget".
None of my family have even considered not taking a test, it goes without saying that if we are able to test for a virus which we want to avoid giving to Nan, we will.
People saying "but there are lots of viruses!!!!!" You're correct, there are, and if there was a test I could take to see if I was carrying any/all of them before I risked giving them to my Nan, I'd take it in a heartbeat. But there isn't - however as there is a test for Covid, I'm not going to see her without taking the test. I'd never forgive myself if I gave her Covid which made her incredibly poorly, simply because I couldn't be bothered with the minor inconvenience of a 2 minute test that has absolutely no negative impact on me whatsoever.
I am glad there are so many people who have no reason to be concerned about Covid now, it's lovely you've all been able to get on with your lives without a second thought of this virus, however please just remember when telling the vulnerable to "get over it" and that they're "paranoid" that there are still some in society who have no choice but to remain cautious over a virus which could wreak havoc on their bodies. This virus can still kill the vulnerable, or make them severely unwell. I have no issue whatsoever in making my Nan feel safer on Christmas, and if it means doing a Covid test, it's the least I can do.