Raw milk is a fully living ecosystem on its own. There is no risk of disease if the cows were tended to properly and are healthy. There's been people who have put living e coli into a glass of fresh raw milk. The enzymes in the raw milk killed the bacteria in around fifteen minutes and was then safe to drink.
In pasteurized milk, the ecosystem has been entirely killed and has left it little more than a rotting petri dish for bacteria. Fully pasteurized milk is cooked, if I recall correctly, up to three times. One thing about pasteurized milk, is there's much less concern about the health of the cows as the treatment process boils, cooks, and kills EVERYTHING in the milk. Also, again providing I remember the stats right, up to 1/4th to 1/3rd of the milk may be PUSS produced by the cows because they are unhealthy and being forced to produce beyond their natural limits. During some of the processing, the puss separates from the milk and rather than remove it, it is put through an additional process that recombines it with the milk and gives it the nice white color again.
Raw milk is a fully living ecosystem on its own. There is no risk of disease if the cows were tended to properly and are healthy. There's been people who have put living e coli into a glass of fresh raw milk. The enzymes in the raw milk killed the bacteria in around fifteen minutes and was then safe to drink.
In pasteurized milk, the ecosystem has been entirely killed and has left it little more than a rotting petri dish for bacteria. Fully pasteurized milk is cooked, if I recall correctly, up to three times. One thing about pasteurized milk, is there's much less concern about the health of the cows as the treatment process boils, cooks, and kills EVERYTHING in the milk. Also, again providing I remember the stats right, up to 1/4th to 1/3rd of the milk may be PUSS produced by the cows because they are unhealthy and being forced to produce beyond their natural limits. During some of the processing, the puss separates from the milk and rather than remove it, it is put through an additional process that recombines it with the milk and gives it the nice white color again.