In April, she announced that she had donated $ 1 million (£ 750,000) to develop one of the most promising 19 vaccines.
Downtown Nashville has been one of the testing sites for the Modern vaccine, which is 95% effective, according to the latest information.
Parton told The One Show on BBC One that she was “so excited” to hear the news.
“I’m sure many millions of dollars from many people have gone into this research,” said co-presenters Alex Jones and Jermaine Jenas.
“I’m a very proud girl today to find out that we were dealing with something that will help us in this crazy pandemic,” the artist said.
A Vanderbilt University spokesman said Parton’s “generous” donation helped “several promising research initiatives.”
Part of the singer’s money helped fund an early-stage study of the Moderna vaccine.
Her donation also helped a convalescent plasma study and research involving antibody therapies, said John Howser, a spokesman for Vanderbilt University Medical Center.
Convalescent plasma is used to treat people who are struggling with COVID infection.