You can't complete eradicate a disease.

Cholera goes wherever the disasters are.

The places where people aren't immunised, tends to be where the outbreaks are. I'm 90% sure I haven't been vaccinated against small pox. As I'm sure a lot of people haven't. Because it isn't a threat. Same reason I haven't been vaccinated against TB. Stupid idea if you ask me considering I'm work Exing on a fucking farm.