Dr. Joseph Varon, 58, the chief medical officer at United Memorial Medical Center, hugs Christina Mathers, 43, a nurse from his team who became infected with COVID-19, at United Memorial Medical Center (UMMC), during the coronavirus disease (COVID-19) outbreak, in Houston, Texas, U.S., July 25, 2020. Mathers was told she tested positive for COVID-19 after she reported feeling ill during one of her shifts. "That's the hardest thing to ever hear... It messes with you," said Mathers, who has been working every other day since April 29. "But I wouldn't go anywhere else but here." REUTERS/Callaghan O'Hare

Worshippers attend afternoon prayers and visit Hagia Sophia Grand Mosque, for the first time after it was once again declared a mosque after 86 years, in Istanbul, Turkey, July 24, 2020.

Local resident Katerina Izvekova, 77, shows her house damaged during a military conflict between militants of the self-proclaimed Donetsk People's Republic and the Ukrainian armed forces near the separation line in the rebel-controlled village of Vesele (Veseloye) in Donetsk region, Ukraine, July 27, 2020.

Grand Master Jay, center, leader of an all-Black militia group called NFAC, leads his followers on a march during an armed rally in Louisville, Kentucky, U.S. July 25, 2020.

A man works to remove the U.S. Consulate plaque at the U.S. Consulate General in Chengdu, Sichuan province, China, July 26, 2020.

Muslim pilgrims maintain social distancing as they circle the Kaaba at the Grand mosque during the annual Haj pilgrimage amid the coronavirus disease (COVID-19) pandemic, in the holy city of Mecca, Saudi Arabia July 29, 2020. Saudi Ministry of Media/Handout via REUTERS

People flee as driver in a blue Jeep rams through the crowd of protesters on Interstate 225 during a march against the death of Elijah McClain and racial injustice in Aurora, Colorado, U.S., July 25, 2020.

A man is seen on a boat after his house was flooded, after the flood situation worsened in Munshiganj district, on the outskirts of Dhaka, Bangladesh, July 25, 2020.

Inmates protest on the rooftop of the San Sebastian prison, to demand government medical assistance, amid the coronavirus disease (COVID-19) outbreak, in Cochabamba, Bolivia, July 27, 2020.

Charles Pecce, 70, and wife Sharon Pecce, 76, survey their destroyed home in the aftermath of Hurricane Hanna in Port Mansfield, Texas, U.S., July 26, 2020. REUTERS/Adrees Latif

A COVID-19 patient reacts after being tested inside a field hospital built on a soccer stadium in Machakos, as the number of confirmed coronavirus disease (COVID-19) cases continues to rise in Kenya, July 23, 2020. Picture taken July 23, 2020.

Teacher Maura Silva, who works for public school Escola Municipal Frei Vicente de Salvador and who created a "hug kit" using plastic covers, embraces her student Yuri Araujo Silva at Yuri's home, amid the coronavirus disease (COVID-19) outbreak, in the 77 Padre Miguel slum in Rio de Janeiro, Brazil July 23, 2020.

A protester standing on barriers near the fence is shot with pepper balls by federal law enforcement officers during a demonstration against police violence and racial inequality in Portland, Oregon, U.S., July 29, 2020.

The casket of late U.S. Congressman John Lewis, a pioneer of the civil rights movement and long-time member of the U.S. House of Representatives who died July 17, is carried via horse-drawn carriage across the Edmund Pettus Bridge in Selma, Alabama, U.S. July 26, 2020.

Beads of sweat run down the forehead of a healthcare worker wearing protective gear after she took swabs from the residents for rapid antigen test, amidst the coronavirus disease (COVID-19) outbreak, at a residential apartment in Ahmedabad, India, July 23, 2020.

A man carries a sheep at a livestock market ahead of the Eid al-Adha festival amid the coronavirus disease (COVID-19) pandemic in Sanaa, Yemen July 28, 2020. Picture taken July 28, 2020.