They say this about a lot of people but she truly deserves it: Dolly Parton is a national treasure. Remember this? Last year, Ms. Parton donated $1 million to Vanderbilt University Medical Center, which worked with the drug maker Moderna to develop one of the first coronavirus vaccines to be authorized in the United States. The federal government eventually invested $1 billion in the creation and testing of the vaccine, but the leader of the research effort, Dr. Mark Denison, said that the singer’s donation had funded its critical early stages. On Tuesday, Ms. Parton, 75, received a Moderna shot at Vanderbilt Health in Tennessee. “Dolly gets a dose of her own medicine,” she wrote on Twitter. A truly great American.