Zulema Riquelme, a 46-year-old nursing technician, receives a shot of the COVID-19 vaccine at the Metropolitan Hospital in Santiago, Chile, Dec. 24, 2020. Chile on Thursday began to vaccinate its population against the novel coronavirus, after the arrival of the first 10,000 doses of the Pfizer-BioNTech vaccine. Zulema Riquelme was the first to receive the vaccine, which was then applied to a doctor, a nurse, a kinesiologist and an assistant, all from different hospitals. (Chilean Presidential Palace/Handout via Xinhua)

Zulema Riquelme, a 46-year-old nursing technician, receives a shot of the COVID-19 vaccine at the Metropolitan Hospital in Santiago, Chile, Dec. 24, 2020. Chile on Thursday began to vaccinate its population against the novel coronavirus, after the arrival of the first 10,000 doses of the Pfizer-BioNTech vaccine. Zulema Riquelme was the first to receive the vaccine, which was then applied to a doctor, a nurse, a kinesiologist and an assistant, all from different hospitals. (Chilean Presidential Palace/Handout via Xinhua)

Chile's President Sebastian Pinera (2nd L) and Health Minister Enrique Paris (1st L) look on as Zulema Riquelme (2nd R) , a 46-year-old nursing technician, receives a shot of the COVID-19 vaccine at the Metropolitan Hospital in Santiago, Chile, Dec. 24, 2020. Chile on Thursday began to vaccinate its population against the novel coronavirus, after the arrival of the first 10,000 doses of the Pfizer-BioNTech vaccine. Zulema Riquelme was the first to receive the vaccine, which was then applied to a doctor, a nurse, a kinesiologist and an assistant, all from different hospitals. (Chilean Presidential Palace/Handout via Xinhua)