Researchers extracted DNA from the remains of people buried in the East Smithfield plague pits, which were used for mass burials in 1348 and 1349.
Museum of London Archaeology (MOLA)
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People protest during a rally calling for more government action to combat the spread of monkeypox at Foley Square on July 21, 2022 in New York City.
Jeenah Moon/Getty Images
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Aerial view of the Beckton Sewage Treatment Works in London. Between February and May, U.K. scientists found several samples containing closely related versions of the polio virus in wastewater at the plant.
mwmbwls/Flickr
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Freetown Elementary School students Mason Santos, left, and Mila Talbot, right, pet Huntah the dog after she finishes checking a classroom.
Jodi Hilton for NPR
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A positive result on a home COVID test. If you catch it once, can you catch it again? Turns out the answer is: Yes.
Jakub Porzycki/NurPhoto via Getty Images
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President Joe Biden speaks at the virtual Global COVID-19 Summit on Sept. 22, 2021, in Washington, D.C. On May 12, the White House will host the second Global COVID-19 Summit.
Evan Vucci/AP
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Health workers share information about tuberculosis with residents of aslum neighborhoods in New Delhi. India has the greatest number of TB cases in the world.
Prakash Singh/AFP via Getty Images
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A colorized electron microscope image from the National Institute of Allergy and Infectious Diseases shows a single human immunodeficiency virus budding from a human immune cell.
AP
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A resident receives a dose of the Pfizer COVID-19 vaccine at a health center in Jakarta, Indonesia, on Jan. 13. This week, Indonesia started a program to give booster shots to the elderly and people at risk of severe disease.
Dimas Ardian/Bloomberg via Getty Images
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Health workers administer COVID tests outside a building placed under lockdown in Hong Kong on Jan. 6. Hong Kong is imposing strict new COVID measures for the first time in almost a year as the omicron variant seeps into the community.
Louise Delmotte//Bloomberg via Getty Images
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Left to right: An illustration of the coronavirus, an illustration of the delta variant and a mural in India.
Hanna Barczyk for NPR / Juan Gaertner/Science Source / Sanchit Khanna/Hindustan Times via Getty Images
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Hanna Barczyk for NPR / Juan Gaertner/Science Source / Sanchit Khanna/Hindustan Times via Getty Images