Joe Palca

An advisory committee to the Food and Drug Administration met to consider the application for emergency use authorization for the Janssen, the vaccine division of Johnson & Johnson, COVID-19 vaccine.

Copyright 2021 NPR. To see more, visit https://www.npr.org.

RACHEL MARTIN, HOST:

Copyright 2021 NPR. To see more, visit https://www.npr.org.

It's taken seven months, and more than 300 million miles to get there, but Hope is on track to arrive at Mars tomorrow.

It's the first ever interplanetary mission from the United Arab Emirates and "Hope" is the name of the SUV-sized spacecraft that is scheduled to orbit Mars and study the Martian atmosphere.

The biotech company Novavax says its COVID-19 vaccine is 89% effective at preventing the illness, according to an interim analysis of a large study conducted in the U.K.

The results come from a clinical trial involving more than 15,000 volunteers, of whom more than a quarter were older than 65.

The company says 62 cases of COVID-19 were seen in the study. Fifty-six occurred in the group that got placebo; six were seen in people who received the vaccine.

Copyright 2021 NPR. To see more, visit https://www.npr.org.

AILSA CHANG, HOST:

Editor's note: This story has been updated to reflect the latest data from a Phase 3 efficacy study of Russia's vaccine.

China and Russia are vying for a role in ending the global coronavirus pandemic.

Both countries have produced vaccines that they intend to sell to countries that can't afford the ones being used in the United States.

Copyright 2021 NPR. To see more, visit https://www.npr.org.

AILSA CHANG, HOST:

Only a vaccine will save America from the COVID -19 pandemic. At least that's the opinion of nearly all public health officials.

Obviously, vaccine manufacturers are critical to any vaccine campaign. But there's another group that plays a less obvious but still crucial role in making sure vaccines do what they're intended: mathematicians.

Even if the Biden administration releases all available doses of the two authorized COVID-19 vaccines, for a while at least, supplies will remain limited. How best to use that limited supply is a question mathematicians can help answer.

Copyright 2021 NPR. To see more, visit https://www.npr.org.

LULU GARCIA-NAVARRO, HOST:

Pages