Dolly Parton has been hailed as a savior thanks to her contributions to the most successful coronavirus vaccine candidate to date.In April, the 74-year-old country music icon donated $1 million (around £756,000) to Vanderbilt University Medical Centre in Nashville, Tennessee, to help fund its Covid-19 research.Vanderbilt was involved in the development of Moderna’s jab, which has become the leading global candidate after showing almost 95 per cent effectiveness against the disease.As health experts and scientists rejoiced at the US firm’s success, Parton fans were quick to offer credit to their idol.“Dolly Parton donated $1 million to Vanderbilt for vaccine research.