How Long Does COVID Immunity Last Anyway?

Ever wish you could have been part of the Lewis and Clark expedition? Us too. The Corps of Discovery came across scores of plants and animals that were new to Western science: Grizzly bears, ponderosa pines, a “barking squirrel” that William Clark would later call the prairie dog ...  Show more

You've heard of black holes. You've heard of stars. But have you heard of the newly discovered black hole stars that may explain multiple mysteries of the universe? We just did and we're honestly freaking out about it. Learn everything you need to know about it in this episode. P ...  Show more

Does your immunity still last for months? We asked a researcher who has been studying omicron reinfections. This episode was produced by Jon Ehrens, edited by Matthew Collette, fact-checked by Laura Bullard, engineered by Paul Mounsey, and hosted by Sean Rameswaram. Transcript at ...  Show more

Immunity to Covid-19. We've all been hoping to develop it ever since the virus emerged two years ago. Since then, a race to vaccinate the world has begun in earnest, with many countries rolling out booster shots in response to the rise of the Omicron variant. Health officials and ...  Show more

The rise of the Delta variant has prompted a thorny question: Do we need a booster dose of the vaccine for Covid-19? Vaccine makers think so, but regulators are yet to be convinced.

Principles are also at stake: Should richer countries be talking about administering extr ...

Many Americans haven't gotten an initial COVID-19 booster. A second one is authorized for some. Others are waiting to see if they can get one soon. Will everyone need them eventually? An FDA advisory committee met Wednesday to discuss what's next in America's booster strategy. Dr ...  Show more