Joe Palca
Stories
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Health
The Viral TikTok Video That Explains Vaccine Science — And Makes You Laugh
A viral TikTok video makes vaccine science understandable and pretty funny (it's a horror film parody). NPR caught up with creator and star Vick Krishna — tech expert by day, videographer by night.
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Health
NIH Statement Raises Questions About AstraZeneca's Vaccine Data
A U.S. trial of AstraZeneca's COVID-19 vaccine may have used outdated information. A statement by the National Institutes of Health says an incomplete view of efficacy data may have been provided.
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Health
Preliminary Results Show AstraZeneca Vaccine Can Prevent COVID-19
AstraZeneca says a study of its vaccine showed an efficacy of 79% for preventing symptomatic disease. The study may meet FDA requirements for considering the vaccine for emergency-use authorization.
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Health
Why Scientists Are Infecting Healthy Volunteers With The Coronavirus
Exposing people to a potentially fatal disease could hasten understanding of COVID-19 and development of new vaccines and treatments. But the risks of such studies raise serious ethical questions.
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Health
FDA Clears The Way For Another COVID-19 Vaccine To Go Into Circulation
The Food and Drug Administration authorized Johnson & Johnson's vaccine for emergency use Saturday, a day after a panel of advisers to the agency voted unanimously in its favor.
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Science
3rd COVID-19 Vaccine May Be Available Soon In The U.S.
The Food and Drug Administration has released its assessment of an application from Johnson & Johnson for emergency use authorization for its vaccine. It finds the vaccine safe and effective.
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Science
NASA's Rover Perseverance Safely Lands On Mars
NASA's six-wheeled rover landed successfully on Mars yesterday. NPR's Joe Palca talks about the descent and landing, and what's next for the mission.
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NASA Lands Another Probe On Red Planet, Looking For Life On Mars
NASA's six-wheeled rover landed on Mars today. It touched down in a crater that housed a lake 3.5 billion years ago, in search of signs of ancient microbial life.
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Science
'Perseverance' Mission Will Put NASA Wheels Back On Mars
Another six-wheeled rover is about to land on Mars. NASA Perseverance's mission is headed to Jezero Crater, which once may have been a lake. It's carrying two new items: a microphone and a helicopter.
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Science
Hope Heads For A Rendezvous With Mars
The UAE probe arrives at Mars on Tuesday, Feb 9. Its purpose is to both study the weather on Mars as well as inspire the next generation of that country's scientists and engineers.