‘Too many are selfish’: US nears 5 million virus cases

Nurses Karla Salazar, right, and Marisol Perez work in a tent set up to help treat COVID-19 patients at El Centro Regional Medical Center in El Centro, Calif., Tuesday, July 21, 2020. (AP Photo/Jae C. Hong)

Diana Vega, a registered respiratory therapist, instructs Nevada National Guardsman on how to test people during the setup of a temporary coronavirus testing site Monday, Aug. 3, 2020, in Las Vegas. (AP Photo/John Locher)

A sign informs customers at the Edison Hotel restaurant about wearing a protective face mask during the coronavirus pandemic, Friday, July 24, 2020, along Ocean Drive in Miami Beach, Fla. Masks are mandated both indoors and outdoors in Miami Beach. People found not wearing a mask are subject to a civil fine of $50. (AP Photo/Lynne Sladky)

BOSTON — Fourth of July gatherings, graduation parties, no-mask weddings, crowded bars — there are reasons the U.S. has racked up more than 155,000 coronavirus deaths, by far the most of any country, and is fast approaching an off-the-charts 5 million confirmed infections, easily the highest in the world.