Is it necessary to work as a milking union in a cattle farm?

Hello, you don't necessarily get brucellosis as a milkman, but the probability of brucellosis is higher for milkmen than for others, and brucellosis must only be found in places where there are many livestock in 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 have brucellosis? It's the same as being a milkman.