I find the idea fascinating and am open to it, yet have major questions as a pediatric therapist and mother of six, I've seen that snottynosed kid goo on me or my kids too many times, and turn up with the same symptoms 3-5 days later. I've seen the stomach bug run thru entire churches and large families even when washing hands, cleaning surfaces, washing linens etc, even when no sick person was at church, just exposed family members. I know our own innate immune system can fight off most things when it's healthy, but why do we see this happen? Since Covid I've been taking lysine, zinc, D3, vit c, elderberry and quercetin,NAC, daily in addition to my normal vitamins and it definitely helps avoid whatever my kids get. But I have yet to see a good explanation for what I see in daily life with sick kids. I wonder too if both theories Are correct to some extent. I have read his stuff but don't have time for long videos.