Out of bacteria, viruses and fungi I fear fungal pathogens more than anything else because this type of pathogen is so highly adaptable and more intelligent than the others. Yes I do alkalize and take borax and lugol's iodine every week. I made up my mind to go the preventative route some years ago and as a result I haven't had flu/colds or been ill for over 5 years now. I did have two bouts of food poisoning during this period -- but that was my own stupid fault !!
The more recent research has identified mycoplasma -- a fungal form of cell wall defficient bacteria -- which seems to be involved in many diseases these days -- from arthritis and pneumonia to cancer. And more evidence keeps turning up that so-called immune diseases seem to have bacteria and other pathogens associated with these conditions.
My own belief -- for what its worth -- is that not only do we have pleomorphism within a species -- we also must except all the evidence that pleomorphism between species also must exist. This is why medical science is so clueless on auto-immune diseases -- because they follow only the precepts of The Germ Theory which effectively states, without exception that there can only be One Disease --> One Germ --> One Cure.
I myself much prefer The Terrain or Cellular Theory of Antoine Bechamp, which fully accepts pleomorphism and also because it makes far more sense than the Germ Theory.