Absolutely correct, some of those same pathogens enter our bodies through the misguided use of vaccines. I know there is much disagreement, on this site, but vaccines have a dark side and may be the cause of modern day syndromes and immune distress which manifests itself in many seemingly uncontrollable forms.
I don’t think it’s vaccines. Almost 100% of the population was immunized in the 50’s through the 70’s, if that was the issue, these problems would be far more prevalent.
I’m thinking more in line with tick borne diseases like Lymes
or this http://www.foodsafetynews.com/2012/06/red-meat-allergy-likely-caused-by-tick-bites/#.UTrJ4hzvsQI
or this
Not that all of is tick or insect born, but the fact is, there are millions of bacteria and viruses out there, unknown and unidentified and trying to kill us.
I think Alzheimer’s might be tied to oral spirochetes and poor dental hygeine.