Where would you deport them to? Whatever your answer, I can assure you that the people over there don’t want measles people either.
Imagine if this kind of thinking prevailed in the HIV hysteria of the 80's/90's. It's relatively easy to follow this approach to its logical conclusion. When you order authoritarianism, it's very likely you'll get it. And not simply in the places you want it.
Are you good with a HIV+ person knowingly infecting others because it's their right to refuse antiviral medication? Measles and other highly contagious diseases can infect large populations without anyone knowing before it's too late.