Pfizer Covid Shot Safely Bolsters Antibodies in Younger Kids (3)

Pfizer Inc. and partner BioNTech SE said their Covid-19 vaccine was safe and produced strong antibody responses in children ages 5 to 11 in a large-scale trial, findings that could pave the way to begin vaccinating grade-school kids within months.

The long-awaited results offer one of the first looks at how well a Covid vaccine could work for younger children. Pressure to immunize kids has been on the climb in the U.S., where a new school year has started just as the delta variant is fueling a surge in cases.

In a trial with 2,268 participants, two shots of a ...