You have warned us about the dangers of milk from large commercial suppliers because they are often contaminated deliberately with chronic disease-causing viruses. Milk-producing cows are suffering periodic epidemics of viral illnesses. Is that a significant vector for some organisms leading to 85% of the many diverse chronic illnesses in humans caused by viruses?

It can be. We cannot make a blanket indictment here, but these viruses are created and dispersed into the environment in a purposeful fashion. There are a number of things that can happen. The primary objective here is to create a visible epidemic among the livestock, and this hurts the dairy farmers who then must keep their cows' product off the market if they fail to pass a health inspection. If there is something infectious that can transfer to the milk, and this is unnoticed, it is an extra vector for possible human infection taking place. So that is all to the good from the standpoint of the interlopers who want the most pain possible for their efforts and, indeed, that can happen. It is not the most efficient and reliable way to spread such viruses, to start from that end rather than contaminate a large batch of milk directly.