About Huntington's disease
The prevalence of Huntington’s disease varies greatly between different geographical regions, which can partly be attributed to differences in case-ascertainment and/or diagnostic criteria, however there is consistent evidence of a lower incidence in Asian populations. There is also evidence its prevalence has increased in Australia, North America and in Western Europe over the past 50 or so years2.
1. Huntington disease
Genetics Home Reference, cited on Feb 2018.
2. The Prevalence of Huntington’s Disease
Rawlins et al., Neuro-epidemiology, Jan 2016.