I wonder scientifically what goes into "recommendation" nowadays, amid all the bickering and turmoil, and i no longer feel I know, and i believe personally in v

I wonder scientifically what goes into "recommendation" nowadays, amid all the bickering and turmoil, and i no longer feel I know, and i believe personally in vaccines, but not in profiteering, which never seemed a discussed concern till the last few years. how can an observer detect if profiteering is influencing recommendation?