Cheryl Cole has "re-evaluated her life" since getting ill, according to a source. Last week, the British pop star was rushed to hospital with a strain of the potentially fatal tropical disease malaria. It is believed the singer contracted the illness from a mosquito bite after a six-day holiday in Tanzania, Africa, with American dancer friend Derek Hough last month. According to reports, Cheryl`s immune system is especially weak due to the star`s hectic work schedule. Since splitting from her footballer husband Ashley Cole six months ago amid claims he was unfaithful, Cheryl has focused on her career. The star`s gruelling schedule included promoting her solo material as well as touring with the Black Eyed Peas and being a judge on the British talent show The X Factor. Since being hospitalised, Cheryl has realised nothing is more important than her health, and she is thought to be re-assessing her life with the help of her loved ones. "She`s had a real fright and this past week has made her re-evaluate everything in her life. Now she`s listened to people closest to her and has vowed to have a change of lifestyle in order for her to get back on top form," a source told British magazine More! As well as re-organising her work commitments and opting out of the final round of The X Factor auditions, Cheryl’s management team are said to be pushing back the release of her second album. Experts say the petite star will also have to rethink her diet to get well quickly as she was previously following a restrictive blood group diet, which involves excluding certain foods depending on your blood type.