I think so. If you want to separate them how would you say “people who get pustules from working with cattle are less likely to catch smallpox” differs from “people who give blood are less likely to have heart disease”?
I think so. If you want to separate them how would you say “people who get pustules from working with cattle are less likely to catch smallpox” differs from “people who give blood are less likely to have heart disease”?