The Florida Department of Health said officials are working alongside the Centers for Disease Control and Prevention to figure out how a 20-something-year-old man contracted the new, more contagious coronavirus strain that was first discovered in the U.K. Lynne Sladky/AP hide caption
Edna Halup, a staff member at a private nursing home, receives a Pfizer COVID-19 vaccine, in Ganei Tikva, Israel, on Dec. 22. Ariel Schalit/AP hide caption
Chinese travelers at a railway station in Beijing, China, wear face masks to protect themselves from the new coronavirus on Jan. 21, 2020. The virus was first identified in Wuhan, China, in Dec. 2019, and since then has quickly spread worldwide. Kevin Frayer/Getty Images hide caption
Health workers from Tongji Hospital in Wuhan, China, share an emotional embrace with their peers from a hospital in Jilin province at the Tianhe Airport. Colleagues who worked on the front lines together bid farewell as Wuhan lifted its coronavirus lockdown in April. Amy Cheng/NPR hide caption
A staff member checks a COVID-19 vaccine package in Beijing. China has approved Sinopharm's vaccine after clinical trials showed it has a 79% efficacy against COVID-19. Zhang Yuwei/Xinhua News Agency/Getty Images hide caption
Field hockey star Sarita Bhise (right) with her mother (far left) and maternal aunt, cleaning onions they've harvested on the family farm. Ananda Bhise hide caption
Dr. Gagandeep Kang, an infectious diseases researcher at the Christian Medical College in Vellore, India, says "[the virus] could have been completely out of control in India." Gagandeep Kang hide caption
A barefoot porter totes a load for an expedition visiting one of the remaining glaciers near the equator, 16,000 feet high on the highest peak in Papua, Indonesia. George Steinmetz hide caption
A worker wearing personal protective equipment disinfects the Holy Redeemer Church in Bangkok after a Christmas Eve mass. Thailand is one of many countries now seeing a surge in cases. Romeo Gacad/AFP via Getty Images hide caption
Patrick Phiri of Malawi and fiancée Fiona ten Have of the Netherlands kiss in her parents' garden. The couple met in Malawi, where they worked for the same charity, and fell in love. A three-week visit to the Netherlands turned into seven months because of pandemic lockdowns and travel restrictions. Julia Gunther for NPR hide caption
The image depicts the coronavirus binding to a human cell. The variant identified in the United Kingdom has a mutation known to increase how tightly the virus binds to human cells. Kateryna Kon/Science Photo Library via Getty Images hide caption
Ulisses Xavier, 52, who has worked for 16 years at Nossa Senhora cemetery in Manaus, Brazil, makes wooden crosses to supplement his income. The cemetery has seen a surge in the number of new graves after the outbreak of COVID-19. Michael Dantas/AFP via Getty Images hide caption
A woman undergoes antibody testing before an injection of the Russian COVID-19 vaccine known as Sputnik V at an outpatient clinic in Grozny earlier this week. Yelena Afonina/Tass via Getty Images hide caption
COVID-19 ads that Los Angeles County Supervisor Sheila Kuehl planned to run on Facebook got caught in the social network's ban on political advertising. Los Angeles County hide caption