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Michaeleen Doucleff

Michaeleen Doucleff, PhD, is a correspondent for NPR's Science Desk. For nearly a decade, she has been reporting for the radio and the web for NPR's global health outlet, Goats and Soda. Doucleff focuses on disease outbreaks, cross-cultural parenting, and women and children's health.

In 2014, Doucleff was part of the team that earned a George Foster Peabody award for its coverage of the Ebola outbreak in West Africa. For the series, Doucleff reported on how the epidemic ravaged maternal health and how the virus spreads through the air. In 2019, Doucleff and Senior Producer Jane Greenhalgh produced a story about how Inuit parents teach children to control their anger. That story was the most popular one on NPR.org for the year; altogether readers have spent more than 16 years worth of time reading it.

In 2021, Doucleff published a book, called Hunt, Gather, Parent, stemming from her reporting at NPR. That book became a New York Times bestseller.

Before coming to NPR in 2012, Doucleff was an editor at the journal Cell, where she wrote about the science behind pop culture. Doucleff has a bachelor degree in biology from Caltech, a doctorate in physical chemistry from the University of Berkeley, California, and a master's degree in viticulture and enology from the University of California, Davis.

Updated July 21, 2021 at 5:50 PM ET

After months of data collection, scientists agree: The delta variant is the most contagious version of the coronavirus worldwide. It spreads about two to three times faster than the original version of the virus, and it's currently dominating the outbreak in the United States, responsible for more than 80% of COVID cases.

Video by Xueying Chang, Kaz Fantone, Michaeleen Doucleff and Ben de la Cruz/NPR / YouTube

When will the pandemic end? How many more COVID-19 waves will the U.S. go through?

In movies such as Contagion, a pandemic begins in a flash. A deadly virus spills over from an animal, like a pig, into humans and then quickly triggers an outbreak.

But that's not actually what happens, says Dr. Gregory Gray at the Duke Global Health Institute. "It's not like in the movies," he says, "where this virus goes from a pig in Indonesia and causes a pandemic."

OK. So what in the heck is going on with all these variants? Why is everyone so worried? And how do they work?

To answer these questions, let's go back in time to January 2020, when we were all blissfully going about our lives, eating in restaurants, cramming into elevators at work and dancing at house parties on the weekends.

Back then, the coronavirus looked a bit like this (well, not really, but if it was made of Legos, it would look like this).

Updated Friday Jan. 15, 7:35 p.m.

A highly contagious version of the coronavirus is rapidly spreading across the U.S., the Centers for Disease Control and Prevention reports Friday.

Rich countries are rapidly claiming the world's lion's share of future doses of COVID-19 vaccine, creating deep inequalities in global distribution.

Despite an international agreement to allocate the vaccine equitably around the world, billions of people in poor and middle-income countries might not be immunized until 2023 or even 2024, researchers at Duke University predict.

Early in the coronavirus pandemic, air travel looked like a risky endeavor. Some scientists even worried that airplanes could be sites of superspreading events. For example, in March a Vietnamese businesswoman with a sore throat and a cough boarded a flight in London. Ten hours later, she landed in Hanoi, Vietnam; she infected 15 people on the flight, including more than half of the passengers sitting with her in business class.

In case you were still procrastinating getting a flu shot this year, here's another reason to make it a priority.

There's a chance the vaccine could offer some protection against COVID-19 itself, says virologist Robert Gallo, who directs the Institute of Human Virology at the University of Maryland School of Medicine and is chairman of the Global Virus Network.

Editor's note: There has been speculation in the media and via Twitter that DNA fragments of the now-defunct 1918 flu pathogen could be preserved under the permafrost and might pose a potential threat to humans if the warming Earth continues to melt layers of frozen soil. A couple of years ago, NPR investigated that question: Could this pathogen — and others — be revived? A version of this story originally ran in January 2018.

Zac Peterson was on the adventure of a lifetime.

Measles is surging. Last week the U.S. recorded 90 cases, making this year's outbreak the second largest in more than two decades.

So far this year, the U.S. has confirmed 555 measles cases, the Centers for Disease Control and Prevention announced Monday. That's 50 percent higher than the total number recorded last year, even though we're only about a quarter of the way through 2019.

And the virus isn't slowing down.