A resident receives an injection Sunday of the Covid-19 vaccine developed by Sinovac Biotech Ltd. at the University of Sao Paulo Hospital in Sao Paulo.

Monica Calazans, a 54-year-old nurse, celebrates after being the first person in Sao Paulo to get inoculated. Photo: IC Photo

A resident receives a dose of the Sinovac vaccine. As of Tuesday, Brazil has reported more than 8.5 million Covid-19 cases nationwide.

Sao Paulo residents line up to be vaccinated.

Researchers prepare vials of the vaccine.

One of the containers of a 120,000-dose shipment of the Sinovac vaccine arrives at the Guarulhos Airport in Sao Paulo on Nov. 19.