Nurses wait for people to come by to receive their coronavirus disease (COVID-19) vaccine at a mobile pop-up vaccination clinic hosted by the Detroit Health Department with the Detroit Public Schools Community District at East English Village Preparatory Academy in Detroit, Michigan, U.S., July 21, 2021.

Student Landrianna Carruth receives a dose of a coronavirus disease (COVID-19) vaccine on the campus of the University of Memphis in Memphis, Tennessee, U.S., July 22, 2021.

An unidentified COVID-19 patient is treated in the ICU at Providence St Joseph Hospital in Orange, California, U.S. July 23, 2021.

Officer Ricky Carter (L) of the St. Petersburg Police Department and Dr. Ruth Whitney, a volunteer with the Bethel AME Church, talk with Patricia Davis encouraging her to receive the coronavirus disease (COVID-19) vaccine and take up efforts to help stop gun violence in St. Petersburg, Florida, U.S., July 23, 2021.

A child stand next to a woman holding an anti-vaccine sign at a rally in Central Park, New York City, U.S., July 24, 2021.

A person and a child sit in the shade during an anti-vaccine demonstration, amid the coronavirus disease (COVID-19) pandemic, in Central Park, New York City, U.S., July 24, 2021.

Nurse Sh’kyra Wagoner fills up syringes with the coronavirus disease (COVID-19) vaccine at a mobile pop-up vaccination clinic hosted by the Detroit Health Department with the Detroit Public Schools Community District at Renaissance High School in Detroit, Michigan, U.S., July 26, 2021.

Deonjay Sailor, 15, receives his first dose of the coronavirus disease (COVID-19) vaccine at a mobile pop-up vaccination clinic hosted by the Detroit Health Department with the Detroit Public Schools Community District at East English Village Preparatory Academy in Detroit, Michigan, U.S., July 21, 2021.

People wear masks against the coronavirus disease (COVID-19), following the CDC recommendation that fully vaccinated Americans wear masks as the highly transmissible Delta variant has led to a surge in infections, in Times Square in New York City, New York, U.S., July 27, 2021.

People gather during an anti-vaccine demonstration, amid the coronavirus disease (COVID-19) pandemic, in Central Park, New York City, U.S., July 24, 2021.

Dieumeeci Ufitimana, 19, receives a COVID-19 vaccine from Vonet Lassiter of the Florida Health Department during the Bethel AME Church "Not My Son" event for vaccination and against gun violence in St. Petersburg, Florida, U.S., July 23, 2021.

Cullen Veasley, 17, receives his second dose of the coronavirus disease (COVID-19) vaccine at a mobile pop-up vaccination clinic hosted by the Detroit Health Department with the Detroit Public Schools Community District at Renaissance High School in Detroit, Michigan, U.S., July 26, 2021.

Nurse Lisa Eason sits in the waiting area as she and other nurses wait for people to arrive for their coronavirus disease (COVID-19) vaccinations at a mobile pop-up vaccination clinic hosted by the Detroit Health Department with the Detroit Public Schools Community District at Renaissance High School in Detroit, Michigan, U.S., July 26, 2021.

U.S. President Joe Biden speaks about the pace of coronavirus disease (COVID-19) vaccinations in the United States during remarks in the East Room of the White House in Washington, U.S., July 29, 2021.

Shaheer Greene-Massenburg, 15, receives his first of the coronavirus disease (COVID-19) vaccine at a mobile pop-up vaccination clinic hosted by the Detroit Health Department with the Detroit Public Schools Community District at Renaissance High School in Detroit, Michigan, U.S., July 26, 2021.

U.S. Rep. Kat Cammack (R-FL) holds up a Capitol Police bulletin requiring masks be worn in interior spaces on the Capitol grounds due to coronavirus disease (COVID-19) during a photo with House Republicans who oppose mask mandates before the group marched to the Senate chamber at the U.S. Capitol in Washington, U.S., July 29, 2021.

People wearing face coverings due to the coronavirus disease (COVID-19) pandemic ride the subway in New York City, U.S., July 27, 2021.

Quin Smith, of Philadelphia Pennsylvania, looks up at a balcony as she walks down Bourbon Street as Louisiana's coronavirus disease (COVID-19) cases rise amid Delta variant, in New Orleans, Louisiana, U.S., July 23, 2021.

COVID-19 patient Brian Parisi, 53, from Orange County, is treated by staff in the ICU at Providence St Joseph Hospital in Orange, California, U.S. July 23, 2021.

Producer and burlesque dancer Trixie Minx hands out face masks to audience members, having asked both the attendees and performers to mask up before the "Sultry Sundays" performance at The Howlin' Wolf as Louisiana rises to worst COVID-19 outbreak in U.S. amid Delta variant in New Orleans, Louisiana, U.S., July 25, 2021.

People wear masks around Times Square, as cases of the infectious coronavirus Delta variant continue to rise in New York City, New York, U.S., July 23, 2021.

A man reacts during an anti-vaccine demonstration, amid the coronavirus disease (COVID-19) pandemic, in Central Park, New York City, U.S., July 24, 2021.