I just wrote the same thing. Vitamin d blood levels about 70, you won’t get too sick even if you catch a flu. Vitamin d + plenty of sleep + no stress = you won’t even catch the flu. But the latter two depend on other people so no guarantees.
I can guarantee no illness from exposure to flu for myself now by vitamin d3 supplementation (5k iu daily unless full day sun exposure over most of my body which doesn’t happen), and if I feel fevery or sore throat beginnings, I hit with liposomal vitamin c, zinc lozenges, and extra sleep, and it’s gone.
Thank you for mentioning sleep! I think it’s much more important than people realize. The few times I’ve found myself feeling sick, I go to bed way early, hunker down and sleep 9-10 hours. That’s usually enough to kick it.
“Vitamin d blood levels about 70”
That’s where I am at, but it takes more than 5000 IU/day to get me there. And I’ve been there for several years now.
The liposomal C is great. So is oil of oregano.