Sandra Lindsay, an ICU nurse at Long Island Jewish Medical Center who received the COVID-19 vaccine, speaks during a media event at Long Island Jewish Medical Center in New York, the United States, on Dec. 14, 2020. The United States started the rollout of its first COVID-19 vaccine on Monday, as the first doses were administered to health care workers and nursing home staffers. (Xinhua/Wang Ying)

A healthcare worker prepares the administration of the COVID-19 vaccine at Long Island Jewish Medical Center in New York, the United States, on Dec. 14, 2020. The United States started the rollout of its first COVID-19 vaccine on Monday, as the first doses were administered to health care workers and nursing home staffers. (Xinhua/Wang Ying)

Stephanie Cal (L), a nurse at Long Island Jewish Medical Center, is inoculated with the COVID-19 vaccine in New York, the United States, on Dec. 14, 2020. The United States started the rollout of its first COVID-19 vaccine on Monday, as the first doses were administered to health care workers and nursing home staffers. (Xinhua/Wang Ying)

Stephanie Cal (L), a nurse at Long Island Jewish Medical Center, is inoculated with the COVID-19 vaccine in New York, the United States, on Dec. 14, 2020. The United States started the rollout of its first COVID-19 vaccine on Monday, as the first doses were administered to health care workers and nursing home staffers. (Xinhua/Wang Ying)

A healthcare worker shows a vial of the COVID-19 vaccine at Long Island Jewish Medical Center in New York, the United States, on Dec. 14, 2020. The United States started the rollout of its first COVID-19 vaccine on Monday, as the first doses were administered to health care workers and nursing home staffers. (Xinhua/Wang Ying)

A healthcare worker prepares the administration of the COVID-19 vaccine at Long Island Jewish Medical Center in New York, the United States, on Dec. 14, 2020. The United States started the rollout of its first COVID-19 vaccine on Monday, as the first doses were administered to health care workers and nursing home staffers. (Xinhua/Wang Ying)

Sandra Lindsay (L), an ICU nurse at Long Island Jewish Medical Center, is inoculated with the COVID-19 vaccine in New York, the United States, on Dec. 14, 2020. The United States started the rollout of its first COVID-19 vaccine on Monday, as the first doses were administered to health care workers and nursing home staffers. (Scott heins/Office of Governor Andrew M. Cuomo/Handout via Xinhua)

New York State Governor Andrew Cuomo (1st R) watches Sandra Lindsay (C, on the screen), an ICU nurse at Long Island Jewish Medical Center, receiving the COVID-19 vaccine in New York, the United States, on Dec. 14, 2020. The United States started the rollout of its first COVID-19 vaccine on Monday, as the first doses were administered to health care workers and nursing home staffers. (Office of Governor Andrew M. Cuomo/Handout via Xinhua)