I use a Dr. to alleviate my ill's. I do not self prescribe my own meds nor use herbs and old methods unless the Dr. says to.
This has worked well for me all my life.
Doing otherwise, I would not have survived polio, nor would I have been able to sew my own fingers on and not get an infection, nor survived cancer. Just to name a few.
My Dr. knows EVERYTHING I take for health and advises me as to what to eat.
After all, he is the one who went to school to help folks stay healthy, I did not!
Just my take on this subject, YMMV!
OH YA, I get a flu shot every year and have done so for 20+ years. Haven't gotten the flu or a cold since I can't remember when.