Complex sentence: Between January and October, 2016, CCHF outbreaks in Pakistan were reported with highest numbers of cases and deaths during August 2016, just before the festival of Eid-ul-Adha (held on September 13-15 in 2016).
Split into simpler sentences: Between January and October, 2016, CCHF outbreaks were reported in Pakistan. The highest numbers of positive cases and deaths were observed in August, 2016, just before the festival of Eid-ul-Adha (held on September 13-15 in 2016).