And some entire US states have been declared TB-free and/or brucellosis free, and cows are routinely tested under various circumstances to ensure that they stay

And some entire US states have been declared TB-free and/or brucellosis free, and cows are routinely tested under various circumstances to ensure that they stay that way. So some of the risks of the past, whether or not they've been exaggerated, are no longer an issue.