Yes, wouldn’t surprise me if the immune response wears off after a while. Guess I’ll find out if some kid coughs on me.
you are not helpless. learn what to do to boost your immune system NOW with natural compounds and the foods you eat. vitamins and supplements can help as most people’s’diets lack in a bunch of areas.
You can have an antibody titer done, if you are really worried about your immunity.
Personally, I'd rather get vaccinated again than have blood drawn for a titer.