Data from two leading COVID-19 vaccine trials indicate they may be between 90 and 95% effective. Joel Saget/AFP via Getty Images hide caption
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Researchers are learning that there is a significant relationship between sleep and dementia, particularly Alzheimer's disease. Basak Gurbuz Derman/Getty Images hide caption
Deep Sleep Protects Against Alzheimer's, Growing Evidence Shows
Astronauts (from left) Victor Glover, Michael Hopkins, Shannon Walker and Japan's Soichi Noguchi wave to family and friends as they leave for the launch site on Sunday. John Raoux/AP hide caption
President-elect Joe Biden walks by Vice President-elect Kamala Harris before delivering remarks on his plan for economic recovery under his incoming administration. Joe Raedle/Getty Images hide caption
A health care worker holds an injection syringe of the phase 3 vaccine trial, developed against the novel coronavirus pandemic by the U.S. Pfizer and German BioNTech company, at the Ankara University Ibni Sina Hospital in Ankara, Turkey. Dogukan Keskinkilic/Anadolu Agency via Getty Images hide caption
Dr. Vivek Murthy, pictured in 2016, is the co-chair of President-elect Biden's coronavirus advisory board. Jessica McGowan/Getty Images hide caption
A SpaceX rocket, with the Crew Dragon capsule attached, lifts off from Kennedy Space Center Sunday in Cape Canaveral, Fla. John Raoux/AP hide caption
A traveler wears face masks at Los Angeles International Airport on Friday. While increased restrictions are being discussed across the nation, many people are not heeding mask-wearing rules. Damian Dovarganes/AP hide caption
A woman holds her 1-year-old son as they wait in line to get a coronavirus test. Boston Globe via Getty Images hide caption
This taken in Oct. 2020 and provided by Pfizer shows part of a "freezer farm," a football field-sized facility for storing finished COVID-19 vaccines, in Puurs, Belgium. AP hide caption
The COVID-19 Vaccine Trial Results: What They Mean, What Comes Next
Medical staff members treat a patient in the COVID-19 intensive care unit at Houston's United Memorial Medical Center on Tuesday. Go Nakamura/Getty Images hide caption
Hospitals Pushed To The Brink, Governors Warn Of Health Care Shortages
Lesley McClurg/KQED Lesley McClurg/KQED hide caption
These men, harvesting sweet potatoes in North Carolina, came to the U.S. on H-2A visas that are designated for seasonal agricultural workers. Such "guest workers" now account for about 10% of U.S. farmworkers. Dan Charles/NPR hide caption
The CDC says that when it comes to cloth masks, multiple layers made of higher thread counts do a better job of protecting the wearer. Michael Stewart/GC Images hide caption
Butyric acid gives some cheeses their distinctively strong scent. Alexander Spatari/Getty Images hide caption
From Stinky Cheese To Cat Pee, Author Takes A 'Nose Dive' Into The Science Of Smell
Kevin and Susan Boudreaux have survived multiple catastrophic floods in Cameron Parish, La. Storm surge from this year's Hurricane Laura severely damaged the RV park they own. Ryan Kellman/NPR hide caption
Gen. Gustave Perna tells NPR that if a safe and effective COVID-19 vaccine is approved by the Food and Drug Administration in December, "10 to 30 million doses of vaccine will be available that we can start distributing" in the United States. Chip Somodevilla/AP hide caption
Operation Warp Speed's Logistics Chief Weighs In On Vaccine Progress
Many long-haulers feel isolated and face disbelief from doctors and loved ones. Bobby Jon Calderon/Getty Images hide caption
From left, astronaut Soichi Noguchi of Japan and NASA astronauts Shannon Walker, Victor Glover and Michael Hopkins walk after arriving at Kennedy Space Center in Cape Canaveral, Fla. The four astronauts will fly on the SpaceX Crew-1 mission to the International Space Station scheduled for launch on Saturday. Terry Renna/AP hide caption