Boy, I sure know *a lot* of people with Covid right now, some of whom feel like absolute death. They're all vaccinated, nearly all of them have had Covid at least once, and most of them are surprised to find that they're sick.
I recommend changing your behavior for at least the next few weeks. Don't go to that crowded indoor gathering. Wear a well-fitting N-95 in that store. Bask in seasonal hygge in your own home.