Nearly half of new US virus infections are in just 5 states

Leanne Montenegro, 21, covers her eyes as she doesn’t like the sight of needles, while she receives the Pfizer COVID-19 vaccine Monday at a FEMA vaccination center at Miami Dade College in Miami. (AP Photo/Lynne Sladky, File)

People wearing face masks as a precaution against the coronavirus wait in line to receive COVID-19 vaccines at a site in Philadelphia on March 29. (AP Photo/Matt Rourke, File)

Nearly half of new coronavirus infections nationwide are in just five states — a situation that is putting pressure on the federal government to consider changing how it distributes vaccines by sending more doses to hot spots.