Katelyn Jetelina reports that "influenza-like illnesses" (with symptoms of coughs, fevers, and sore throats) have reached seasonal epidemic levels in the US: "This is when I start masking in crowded indoor spaces like airports. Yes, well-fitted masks work. This is a physics question with a clear answer. And I’ll take all the protection I can get—I’d love to not miss upcoming school performances, work travel, and some fun family events."
(https://yourlocalepidemiologist.substack.com/p/fall-vaccination-rates-are-down-flu)

If you're not already masking in crowded indoor spaces, now is the time to get your N95/KN95s back out. You may be confident your immune system can handle whatever comes your way, but it's not fair to assume that is true of everyone you share space with.