Deborah Sampson, left, a nurse at a University of Washington Medical Center clinic in Seattle, gives a Pfizer COVID-19 vaccine shot to a 20-month-old child, June 21, 2022, in Seattle. (AP Photo/Ted S. Warren, File)
Lauran Neergaard AP Medical Writer Pfizer is asking U.S. regulators to authorize its updated COVID-19 vaccine for children under age 5 — not as a…
