Where are the areas with more beriberi patients?

In tropical and subtropical regions with warm and humid climate, there are more beriberi patients. In China, the incidence of beriberi is high.

The incidence rate in parts of southern China can reach 50%-60%, and the incidence rate in some special occupations (such as miners) can reach 80%- 100%. In ancient times, when people were used to barefoot, beriberi was rare. With the development of human civilization and the popularity of wearing shoes, there are more and more beriberi patients.