A migrant worker wearing face masks to help curb the spread of the coronavirus walks up to a pedestrian bridge in Beijing, Sunday, December 6, 2020. Provincial governments across China are placing orders for experimental, domestically made coronavirus vaccines, though health officials have yet to say how well they work or how they may reach the country's 1.4 billion people. (Photo by Andy Wong/AP Photo)

A man prepares to tie a black ribbon next to a makeshift memorial during a prayer ceremony for the victims of the 2004 tsunami on the 16th anniversary of the disaster, at Marina Beach in Chennai, India, December 26, 2020. (Photo by P. Ravikumar/Reuters)

A three minute time exposure shows the launch of a SpaceX Falcon 9 from Cape Canaveral Space Force Station Launch Complex 40, Thursday, January 7, 2021 in Port Canaveral, Fla. The rocket is carrying the Turksat 5A satellite for Turkey. (Photo by Malcolm Denenark/Florida Today via AP Photo)

A protester raises her fist at the entrance of Highway 280 and S. 4th St. as people protest the killing of George Floyd in Minneapolis in downtown San Jose, Calif., on Friday, May 29, 2020. (Photo by Nhat V. Meyer/Bay Area News Group)

A National Guard member mounts guard as a man exercises during a rally against George Floyd death in Minneapolis police custody, in Los Angeles, California, U.S., June 2, 2020. (Photo by Mike Blake/Reuters)

An Indian priest covers his face with a mask as a precaution against coronavirus and prays at a temple, in Prayagraj, India, Monday, June 8, 2020. (Photo by Rajesh Kumar Singh/AP Photo)

Switzerland's Lea Sprunger in action during the 300m hurdles race during the Weltklasse Zurich Inspiration Games, a virtual international athletics meeting with 30 athletes in eight disciplines at seven venues worldwide, in the Letzigrund stadium in Zurich, Switzerland, Thursday, July 9, 2020. (Photo by Arnd Wiegmann/Reuters)

Cosplayers wearing face masks pose for a picture at the China Digital Entertainment Expo and Conference (ChinaJoy) in Shanghai, following the coronavirus disease (COVID-19) outbreak, China on July 31, 2020. (Photo by Aly Song/Reuters)