Doctors have advised her to rest as she fights the mosquito-borne illness, which has reportedly left her unable to speak. Cole's representative has confirmed she will no longer take part in the two-day V Festival starting Aug 21-22, reports contactmusic.com. "Cheryl Cole is making good progress but following medical advice she will not be able to take part in X Factor's boot camp stage or perform at V Festival," said the representative. She has also pulled out of the 'boot camp' auditions of Britain's "The X Factor," which were due to begin on July 22.