In photos: First vaccines administered in U.S.

The first doses of Pfizer's long-awaited coronavirus vaccine were distributed in the U.S. on Monday.

The state of play: Vaccines will first go to frontline health care workers followed by older and vulnerable populations. The distribution of Pfizer vaccine marks the beginning of a possible end of the coronavirus pandemic, and may soon be followed by a rollout of vaccines from Moderna and AstraZeneca.

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In photos...

The Pfizer vaccine. Photo: Timothy A. Clary/AFP via Getty Images

Sandra Lindsay, a nurse, is inoculated with the COVID-19 vaccine on Dec. 14 in Queens, New York City. Photo: Mark Lennihan - Pool/Getty Images

FIRST VACCINE IN FLORIDA: A nurse at Tampa General Hospital received the first non-trial vaccination in the state of Florida Monday morning. pic.twitter.com/ZLz979sPdN

— WPBF 25 News (@WPBF25News) December 14, 2020

Emergency nurse David Conway received the first COVID-19 vaccine in Iowa this morning. A shipment of about 1,000 doses of the Pfizer vaccine arrived at @uihealthcare early this morning. More: https://t.co/bnavSFDGQ7 @gazettedotcom pic.twitter.com/7uaU16djiN

— Andy Abeyta (@andy_abeyta) December 14, 2020

Beth Sum, RN, receives a COVID-19 vaccine on Monday in Louisville, Kentucky. Photo: Jon Cherry/Getty Images

Gov. Andy Beshear watches as Dr. Jason Smith receives a COVID-19 vaccination on Monday in Louisville, Kentucky. Photo: Jon Cherry/Getty Images