Dukoral is a newly developed vaccine for cholera. Will those who need it be able to get the vaccine? Cost and logistics pose obstacles. The vaccine won't address the underlying cause of the lack of access to clean water and basic sanitation.
Cholera is a disease you get from contaminated water and food. Although it is practically gone in the USA, it is prevalent in developing countries. It's treatable, but people can't get the treatment for many reasons.