Complex sentence: By 12 December 2008,11 deaths and 859 infections had been recorded in South Africa, rising to 2,100 cases and 15 deaths by 14 January 2009, and to 12,000 cases and 59 deaths by 10 March.
Split into simpler sentences: By 12 December 2008 11 deaths and 859 infections had been recorded in South Africa. This rose to 2,100 cases and 15 deaths by 14 January 2009 and to 12,000 cases and 59 deaths by 10 March.