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PHOTO: Study participant Henry Magendantz gets an infusion of the experimental Alzheimer's drug aducanumab at Butler Hospital in Providence, R.I., May 27, 2021. — Kayana Szymczak/The New York Times via Redux

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PHOTO: Larcetta Linear receives the Covid-19 vaccine at a mass vaccination center at the Tinley Park Convention Center on Jan. 26, 2021 in Tinley Park, Ill. — Scott Olson/Getty Images, FILE

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PHOTO: People pose for a picture after getting COVID-19 vaccinations at Grand Central Terminal on May 12, 2021 in New York City. — Spencer Platt/Getty Images

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PHOTO: A healthcare worker holds syringes with the Moderna and Pfizer vaccines against COVID-19 at a vaccination centre, in El Paso, Texas, May 6, 2021. — Jose Luis Gonzalez/Reuters

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PHOTO: Registered Nurse Morgan James loads a syringe with a dose of the Pfizer Covid-19 vaccine at the Blood Bank of Alaska in Anchorage, March 19, 2021. — Frederic J. Brown/AFP via Getty Images

'Approved' or 'authorized'? When it comes to COVID-19 vaccines, words matter.

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