Is it necessary to go to the dairy farm to be a milking union?

Hello, the milkman may not get brucellosis, but the probability of brucellosis is higher than others, and brucellosis must only exist in places with many livestock such as Inner Mongolia and Xinjiang. In addition, people who often eat mutton hotpot are more likely to get brucellosis than those who don't, but how many people who eat hotpot get brucellosis? It's the same as being a milkman