Could Beyoncé do for the coronavirus vaccine what Elvis did for polio?

Beyoncé could help, it's been suggested, as could Tom Hanks or The Rock. Or maybe an athlete instead. Serena Williams, perhaps, or even Michael Jordan? As millions of Americans continue to express reluctance or outright refusal to get vaccinated against the coronavirus, the country's political and public-health leaders are pondering a question critical to ending the pandemic: Who can change their minds? When the federal government faced a similar dilemma more than a half-century ago, it had a king at its disposal.