Pfizer

Pfizer says it is about to seek U.S. authorization for a third dose of its COVID-19 vaccine, but U.S. health officials say a booster isn't needed yet.

The challenge of refrigerating COVID-19 vaccines is acute in sub-Saharan Africa, where only 28% of health care facilities have reliable power. One solution? A new kind of freezer powered by the sun.

On the first European trip of his presidency, Biden will announce a major U.S. contribution to the global vaccine effort — part of an effort to end COVID-19 "everywhere."

President Biden's commitment Monday to donate doses of Moderna, Pfizer and Johnson & Johnson vaccines adds to an earlier promise of 60 million doses of AstraZeneca.

Parents who have enrolled their children in these studies say the risk is worth it for the greater good.

Children as young as 12 can now get Pfizer's COVID-19 vaccine, but it may be hard to convince some parents to let them. NPR's Mary Louise Kelly and pediatrician Dr. Sally Goza discuss this hesitancy.

The FDA has approved giving the vaccine to ages 12 and older. By when and where, and what about younger kids? You have questions. We have answers.

Pfizer said in late March that clinical trials found "100% efficacy and robust antibody responses" to the coronavirus in 12- to 15-year-olds.

The agency's approval of the Pfizer-BioNTech vaccine — shown to be 95% effective — would go beyond the speedier and less rigorous emergency use authorization currently granted to the vaccine.

Pfizer plans to submit emergency-use authorization requests in September, with one covering children 2 to 5 years old and a second applying to ages 5 to 11.