California is joining some other states in lowering the age of eligibility. It has distributed just shy of 900,000 doses and has more than 2 million doses on hand.
****EMBARGOED UNTIL 5PM ET*****Johnson & Johnson reported on Wednesday that its COVID-19 vaccine appears safe. Clinical trial results are expected to be published later this month.
NPR's Ailsa Chang talks with biologists Pardis Sabeti and Sharon Peacock about how genomic sequencing was used in the U.K. to trace a new coronavirus variant and what the U.S. can learn from it.
An uneven vaccine rollout across Southern states is causing frustration. Health departments are overwhelmed with people seeking shots as phone lines and websites are unable to keep up with the demand.
NPR's Audie Cornish talks with South African health official Anban Pillay about challenges in COVID-19 vaccination in his country as wealthier countries lock up much of the world's vaccines.
It appears to be 50% more infectious, and researchers predict the new coronavirus variant could start to dominate in the U.S. by March. The time to prepare is now, they say.
Dr. Alok Kanojia, known as Dr. K, is a Harvard-trained psychiatrist specializing in addiction. He addresses mental health issues within the Twitch audience, which is largely made up of gamers.
Dr. Anthony Fauci says the country will likely need a vaccination level of between 70% and 90% to reach herd immunity. Right now, that math doesn't quite add up.