Complex sentence: EVD outbreaks occur intermittently in tropical regions of sub-Saharan Africa; between 1976 and 2013, the World Health Organization reported a total of 24 outbreaks involving 1,716 cases.
Split into simpler sentences: EVD outbreaks occur intermittently in tropical regions of sub-Saharan Africa. Between 1976 and 2013, the World Health Organization reports a total of 24 outbreaks involving 1,716 cases.