This Doctor nails it. It’s 22 minutes, but fast forward to 3:30 I’s well worth the time to listen and learn.
And while we’re on the subject matter of our Immune system, here’s some more help, 3 minutes.
How to Protect Yourself From Colds, Flus and Other Viruses
Doc covers it from A to Z in this 40 minute clip.
h/t eversoclear