A health worker prepares a dose of the Pfizer BioNTech vaccine at a COVID-19 vaccination site at the University of Nevada in Las Vegas on March 15.

A health worker prepares a dose of the Pfizer BioNTech vaccine at a Covid-19 vaccination site at the University of Nevada in Las Vegas on March 15, 2021. – Vice President Kamala Harris is visiting Las Vegas Monday to promote the $1.9 trillion Covid relief package, known as the American Rescue Plan. (Photo by MANDEL NGAN / AFP) (Photo by MANDEL NGAN/AFP via Getty Images)