COVID-19 absolutely did not help anyone who already had some kind of health anxiety. I borrowed this guide from the library as it's a new 2022 edition, which I hoped would be updated to cover the pandemic. Only very brief mentions are included, which is disappointing. The examples used are almost all anxiety about non-infectious illnesses like cancer, motor neurone disease, heart attacks, and schizophrenia. The advice is still largely applicable to fear of COVID-19, I think. There's not much need to design exposure tasks for it, though. They happen whether you want them or not!
I'm giving the book four stars as it is a very readable, well-explained, and clearly structured guide to CBT techniques. For me it was a reminder of the CBT approach and that I don't have classic health anxiety. Ways in which health fears can overlap with phobias and disordered eating aren't covered. Thus it seems like a potentially very helpful book to some but I don't think it will really work for me. (I've already given CBT a try on three previous occasions.) I found reading it calming, though, and the chapter on fear of death is particularly good.