In photos: First coronavirus vaccines administered in the 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.