The parents of a four-year-old with an aggressive childhood cancer are desperately trying to raise funds for her to have lifesaving preventative treatment in America. Maysaa Yaqub, of Burnley, was diagnosed with high-risk neuroblastoma, an aggressive childhood cancer that has a 40-50 per cent chance of long-term survival in March this year. Dad Osama Yaqub, 40, said his little daughter had become very clingy and she was rejecting certain foods at the height of lockdown. Things took a turn for the worse when her lips turned blue and her tummy became swollen, so they took her to the GP, followed by a visit to Burnley A&E. Read more:Man was killed…