How many people in the world have Williams Syndrome?

The prevalence of Williams Syndrome is estimated at about 1 in 7,500 to 1 in 20,000 individuals worldwide, making it a relatively rare condition. This means that there are approximately 10,000 to 26,000 individuals with Williams Syndrome living in the world today. However, it's important to note that the prevalence of the condition may vary across different regions and countries due to factors such as the availability of genetic testing, healthcare infrastructure, and population size.