lol
Do you know why you don't get those sicknesses? Because all the sensible people got immunizations (i.e your parents and everyone else) so now you haven't and most likely wont be exposed to any dangerous illness. (excluding 3 world countries)
My point is how often are you ill? Do you consider it normal to go to the doctors and get antibiotics that interfere with your body's internal bacteria? I do not, which is why I consider achieving actual good health to be a better way to go about your life rather than taking pills that supposedly give you better health.
Do you know why you don't get those sicknesses? Because all the sensible people got immunizations (i.e your parents and everyone else) so now you haven't and most likely wont be exposed to any dangerous illness. (excluding 3 world countries)