People stand in line for COVID vaccine in Brazil
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A Small City Could Have a Big COVID Impact

Serrana, Brazil is attempting a radical vaccination experiment

A small city outside of Sao Paulo, Brazil is running a city-wide experiment in vaccination. Sponsored by the Instituto Butantan research facility, the goal of Project S was to vaccinate at least 80% of the adults in Serrana. By the end of April 2021, they had reached a 95.7% full vaccination rate among adults.

The  is using the Chinese CoronaVac vaccine, which uses an inactivated form of the SARS-CoV-2 virus. Researchers are hoping the large scale experiment can answer several questions, including the real-world effectiveness of the CoronaVac vaccine against variants, and how long the vaccine offers protection. It will also provide interesting data about how vaccination rates, even with vaccines with lower efficacy like CoronaVac, affect overall viral spread.