In this Aug. 26, 2021, photo, Parsia Jahanbani prepares a syringe with the Pfizer COVID-19 vaccine in a mobile vaccine clinic operated by Families Together of Orange County in Santa Ana, Calif. An international group of scientists is arguing the average person doesn't need a COVID-19 booster yet — an opinion that highlights the intense scientific divide over the question. (AP Photo/Jae C. Hong) **FILE**
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