Flu absolutely killed a grip of people when it was new.
It eventually became endemic and what we live with now. More or less what we have with covid. It will rear its ugly head every year as it mutates. Some will get it and have a rough time, some people’s immunity or vaccine will help make it less deadly contagious as it was in 2020.
Life goes on. Wear a mask or don’t, but we are way past the point of putting the genie back in the bottle