When COVID-19 first broke out in Wuhan, scientists tracked a large number of the cases to the Huanan Seafood Market in Wuhan. Above: The Wuhan Hygiene Emergency Response Team departs the market on Jan. 11, 2020, after it had been shut down to prevent the spread of the coronavirus. Noel Celis/AFP via Getty Images hide caption

Michaeleen Doucleff
Encouraging Collaboration Early On Can Lead To More Helpful Children Later
World Health Organization investigative team member Peter Daszak (shown here during a trip to China in February) tells NPR that the group's report calls for additional research on farms that breed exotic animals in southern China. Hector Retamal/AFP via Getty Images hide caption
A researcher with Franceville International Medical Research Centre collects bats in a net on November 25, 2020 inside a cave in Gabon. Scientists are looking for potential sources for a possible next coronavirus pandemic. Steeve Jordan/AFP via Getty Images hide caption
Next Pandemic: Scientists Fear Another Coronavirus Could Jump From Animals To Humans
Understanding Where Coronaviruses Come From And How They Enter Humans
The author's daughter, Rosy, at age 2 as she does dishes — voluntarily. Getting her involved in chores did lead to the kitchen being flooded and dishes being broken. But she is still eager to help. Michaeleen Doucleff/NPR hide caption
A health officer in a protective suit collects a sample from a package of imported frozen food for a coronavirus rapid test at a wholesale market in China. Wu Zheng/VCG via Getty Images hide caption
World Health Organization Finishes Investigation Into Origins Of COVID-19
An illustration of the variant found in the United Kingdom. To infect a cell, the virus's spike protein (red) has to bind to a receptor on the cell's surface (blue). Mutations help the virus bind more tightly. Science Source hide caption
Extraordinary Patient Offers Surprising Clues To Origins Of Coronavirus Variants
Indigenous health care workers treat patients last week at a campaign hospital set up in the Parque das Tribos neighborhood of Manaus, Brazil. Oxygen shortages at hospitals in Brazil's Amazon prompted authorities to airlift patients to other states. Jonne Roriz/Bloomberg via Getty Images hide caption
Moderna Is Working On Booster Shot To Protect Against COVID-19 Variant
Workers check oxygen tanks at a hospital in Manaus, Brazil. Severe oxygen shortages as a second coronavirus wave is surging have prompted local authorities to airlift patients to other parts of Brazil. Jonne Roriz/Bloomberg via Getty Images hide caption