[Jane Long]

Thx, to both, for your replies. Sounds like it’s natural immunity (the life long kind :)

[greeneyes]

Well, it may be immunity more like the immunity to flu rather than chicken pox. We don't know yet. We do know how important T cells are, and the injection doesn't do it.

Also if a patient is deficient in Vitamin D, the T cells aren't activated. Glutathion also is important etc., but if you give the body what it needs for the immune system to function at full measure, you'll for sure be better off than if you are run down and vitamin deficient.