Dolly Parton announced on Tuesday that she has received her first dose of the Moderna COVID-19 vaccine, which was developed with help from her $1million donation early last year.The 75-year-old country music icon posted a picture of herself getting the injection, with a caption that read: 'Dolly gets a dose of her own medicine.'She received the shot from Vanderbilt University Medical Center, the research center which received the million-dollar donation from the '9 to 5' singer last April, as she called on 'all of you cowards out there' to book an appointment for a jab.Parton learned that her money was used to develop the shot in November when she was listedas one of several donors as it was announced that Moderna’s coronavirus vaccine.