Is Onchocerciasis a common illness found in many developed countries?

Onchocerciasis, also known as river blindness, is primarily a disease found in specific regions, particularly in parts of Sub-Saharan Africa and some areas of Latin America, where the blackflies that carry the parasite Onchocerca volvulus thrive. In developed countries, the prevalence of Onchocerciasis is extremely low, largely due to effective public health measures, including vector control and treatment strategies implemented in endemic regions.

While some diseases can have a wider distribution, Onchocerciasis is not one of them in developed countries, making the assertion that it is a common illness there incorrect. This understanding of endemic diseases highlights the importance of regional public health efforts and awareness among health professionals regarding the geographical distribution of various illnesses. Consequently, the answer that states Onchocerciasis is not common in developed countries is appropriate.