What causes compromised immune systems? When we distance ourselves from FATHER, our immune systems weaken.
We must not allow ourselves to become void of The Word or HIS fellowship. We must renew our minds daily to guard against becoming void. I learned this Truth in 1984 when He revealed this reality. Memorizing a passage and simply regurgitating it is not renewing the mind. Studying and meditating on the various facets of passages qualifies as renewing the mind.
When you fix the Spiritual issue of immune defense, your body will more readily and effectively use the vitamins and supplements to restore a strong immune system. This is why I wrote about some primary supplements meant to boost your immunity against bacteria and viruses.
FYI: If you have taken any antibiotics, your gut needs to rebuild good flora as a defense mechanism, antibiotics tend to wipe out all bacteria in the gut. My wife and I consume yogurt that has a least six live beneficial bacteria listed on the label. Let The Holy Spirit guide you in determining which supplements and how much to consume. Also, check with your doctor before consuming anything new. Each of us is unique so I can only share what my wife and I take. We have both had comprehensive blood tests so we know where we stand physically.