This is a great practical health information that i have seen recently on steemit....having a low immunity is not a problem if you can adapt your lifestyle according to it...and self confidence and self motivations are main two things required for being healthy both mentally and physically....
whenever i see story like this, i remeber the great scientist stephen hawking, who was told he would die within months of the diagnosis of ALS(deadly neuro muscular disease)...not only he is still alive today but also has given great contribution to the scinece which we would not have got in decades..