When they started feeding cows distillers grains, that's when the corporate farms started and 100% of the people that drank that raw milk, died.
After they started pasturizing that corp farmed raw milk, only 50% of the people died from it.
It wasn't until they cleaned up the environments of these corporate CAFO (concentrated animal feeding operations) farms that people were not dying from the milk.
Cows are forage creatures designed to eat grasses, hay and alfalfa.
When they feed cows grains, it changes the ph of the rumen causing pathogens to infest them.