epidemiology, pathophysiology and immunology. These are all dynamic fields that are ever changing and adding to the breadth of knowledge in the particular subject. In these realms, there are never definitive truths
This is great news and a rare admittance that these sciences are fallible and their "truths" are anything but etched in stone. However thank god they are evolving, they've been anchored in the dark ages far too long,causing untold harm. Particularly immunology and its archaic and sadistic practice of inoculation and vaccines.