I haven’t had a flu shot in over 20 years…and I avoid the flu/colds, etc by doing the following….
I put a capful of 3% hydrogen peroxide (store bought) in each ear (one at a time) and leave it in there for 5-15 minutes…if it bubbles, it’s eliminating germs, etc. When I start feeling something coming on, colds, etc, I do this several times a day…other than that, I do this at least once a week to be safe and sick-free. I also take vitamin C, vitamin E, and Oscillococcinum (made by BOIRON).
The https://www.vitaminshoppe.com just had a sale on Oscillococcinum, so I stocked up…:). I bought 24 doses for $31.62…that’s approx $1.32 per dose…real cheap!