Increasingly, many people in the U.S., like these teens in a Miami grocery story in August, now routinely wear face masks in public to help stop COVID-19's spread. But social distancing and other public health measures have been slower to catch on, especially among young adults, a national survey finds. Jeff Greenberg/Universal Images Group via Getty Images hide caption
Police stand guard outside of a rally with Vice President Pence on Oct. 13 in Waukesha, Wis. The state is experiencing a surge of COVID-19 cases, threatening to overwhelm rural hospitals. Scott Olson/Getty Images hide caption
Pollution is a global problem. Above: Stockton Street in the Chinatown district of San Francisco on Sept. 9, a time when air quality was affected by wind and wildfires. David Paul Morris/Bloomberg via Getty Images hide caption
An employee takes a pile of chairs inside a closing bar on the Place du Capitole in Toulouse, France on Saturday. Coronavirus cases in the country just topped a million, and there's a new government-imposed curfew. In large parts of the France you can't be out after 9 p.m. Fred Scheiber/AFP via Getty Images hide caption
When Tiffany Qiu found herself on the hook for her usual 30% Blue Shield of California coinsurance after the hospital quoted 20%, she pushed back. Shelby Knowles for KHN hide caption
Farida Mercedes and her two sons Sebastian, 5, (left) and Lucas, 7, stand in their backyard in Fairlawn, N.J. Mercedes left her job as an assistant VP of HR at L'Oreal in August after working there for 17 years. As hundreds of thousands of women dropped out of the workforce in September, Latinas led the way, leaving at nearly three times the rate of white women. Erica Seryhm Lee for NPR hide caption
President Trump has promised at campaign rallies to protect patients with preexisting conditions, but he has not explained how he plans to do that. Evan Vucci/AP hide caption
In this photo provided by Eli Lilly, a researcher tests possible COVID-19 antibodies in a laboratory in Indianapolis, Ind. On Monday, U.S. government officials announced they are putting an early end to a study testing an Eli Lilly antibody drug for people hospitalized with COVID-19 because it is unlikely to help. David Morrison/AP hide caption
Colorado Gov. Jared Polis speaks during a news conference on Oct. 20 about the steady increase in new coronavirus cases in the state. David Zalubowski/AP hide caption
Passengers queue at the American Airlines counter at Ronald Reagan National Airport on Sept. 17. Coronavirus cases are surging across the country as the holiday season approaches, leaving many families with questions about traveling to gather together. Daniel Slim/AFP via Getty Images hide caption
Cars line up Friday at a coronavirus testing site at the University of Texas at El Paso. The area has seen a surge in cases in recent weeks, and a two-week curfew is now in effect in El Paso County. Paul Ratje/AFP via Getty Images hide caption
On average, each U.S. nursing home is connected to seven others through shared staff, a study by Yale and UCLA researchers suggests. Rigorous infection control measures can curb the spread of the coronavirus, but many workers say they still don't have sufficient masks and other personal protective equipment. SDI Productions/Getty Images hide caption
Paris is under nightly curfew, starting at 9, to curb the spread of rising coronavirus cases. Kiran Ridley/Getty Images hide caption
In Fort Collins, Colorado State University has been running a robust wastewater testing program since the start of the fall semester. Researchers regularly collect samples from 17 sites across campus, including the Westfall Hall dormitory. Elissa Nadworny/NPR hide caption
The uncertainty is getting to us: A majority of Americans report that the election is stressing them out. VIEW press/Corbis via Getty Images hide caption
A waiter cleans a table this month after closing in St. Germain-en-Laye, west of Paris, to comply with COVID-19 restrictions forcing restaurants in the French capital to close. France has imposed a nighttime curfew in Paris and other major cities to curb the spread of the coronavirus. Michel Euler/AP hide caption
Marissa Tuping, a rural midwife, and Risa Calibuso, right, arrive in Nueva Vizcaya Provincial Hospital on July 21. Calibuso gave birth to her son moments later. Xyza Cruz Bacani For NPR hide caption
Midshipmen wearing face masks stand and salute before the Navy Midshipmen play against the Houston Cougars on Saturday in Annapolis, Md. Researchers have tried to estimate how many lives would be saved by universal mask-wearing. Patrick Smith/Getty Images hide caption
A heavily redacted supply contract between the federal government and vaccine developer Moderna, headquartered in Cambridge, Mass., was released Friday. Joseph Prezioso/AFP via Getty Images hide caption
Polish President Andrzej Duda speaks to a crowd in September. Duda is in isolation after testing for the coronavirus. Mateusz Slodkowski/AFP via Getty Images hide caption
A University of Washington research coordinator holds up a swab after testing a someone for coronavirus on Oct. 23 in Seattle. The U.S. recorded a record high number of new daily cases Friday. Elaine Thompson/AP hide caption
TRUMP INTERNATIONAL HOTEL - COLUMBUS CIRCLE, NEW YORK, NY, UNITED STATES - 2017/01/15: Hundreds of activists and allies from the newly-formed anti-Trump group Rise & Resist staged a peaceful protest at Trump International Hotel and Tower in New York City, to fight against the radical changes to the American healthcare system proposed by the Trump Administration and Republicans. Erik McGregor/LightRocket via Getty Images hide caption