He’s right.
My flu shot story: I’ve lived here 18 years. Got a flu shot once, 17 years agp. Then came down with the flu. No shot since then and no flu.
Big Pharma sux, vitamin C rocks.
And sunshine and fresh air.
I took them every year for decades in the military. Caught the flu about every 5 years and spent 3-4 days feeling sick annually in between. Since I retired? No flu shots and got sick once in the last 15 years.
Almost all Americans are chronically short of Vitamin D.
Get up to speed on that, and for a normal, healthy person - common colds and flu will become very rare.