https://apnews.com/e871c33dd713b5a6ce9f485732daab09

WASHINGTON (AP) — Influential government advisers will debate Friday if there's enough proof that a booster dose of Pfizer's COVID-19 vaccine is safe and effective — the first step toward deciding which Americans need one and when.

The Food and Drug Administration on Wednesday posted much of the evidence its advisory panel will consider. The agency struck a decidedly neutral tone on the rationale for boosters — an unusual and careful approach that's all the more striking after President Joe Biden and his top health advisers trumpeted a booster campaign they hoped to begin next week.