Pfizer asks FDA to allow covid-19 vaccine for kids under 5
Nurse Lydia Holly prepares a child's covid-19 vaccine dose on Nov. 3, 2021, at Children's National Hospital in Washington. (AP File)
WASHINGTON — Pfizer on Tuesday asked the U.S. to authorize extra-low doses of its covid-19 vaccine for children under 5, potentially opening the way for the very youngest Americans to start receiving …