Onchocerciasis had already been known for a long time, but until 1930 no other specialist in tropical diseases had ever identified severely afflicted blind people anywhere in Africa.
However, until 1930 no other specialist in tropical diseases had ever identified these severely afflicted blind people anywhere in Africa. Onchocerciasis had already been known for a long time.
Onchocerciasis had already been known for a long time. However, until 1930 no other specialist in tropical diseases had ever identified these severely afflicted blind people anywhere in Africa.
Onchocerciasis had already been known for a long time. However, until 1930 no other specialist in tropical diseases had ever identified these severely afflicted blind people anywhere in Africa.