Complex sentence: Roddick was diagnosed with liver cirrhosis due to long-standing hepatitis C in 2004, and after she revealed this to the media in February 2007, she promoted the work of the "Hepatitis C Trust", and campaigned to increase awareness of the disease.
Split into simpler sentences: Roddick was diagnosed with liver cirrhosis due to long-standing hepatitis C in 2004. After she revealed this to the media in February 2007, she promoted the work of the "Hepatitis C Trust", and campaigned to increase awareness of the disease.