[3] While other communities were struggling to deal with the COVID-19 pandemic in Brazil, Serrana participated in a study wherein 100% of its adult population was supposed to be vaccinated with CoronaVac.

Prior to the mass vaccination, 5% of Serrana's population had been infected, one of the highest rates in Brazil.

According to Ricardo Palacios, a director at São Paulo's Instituto Butantan, "The most important result was understanding that we can control the pandemic even without vaccinating the entire population.

[8] The company is currently an operator of cell phones, fixed lines, internet (fiber optics/4G) and television (satellite and cable).

This geographical article relating to the state of São Paulo is a stub.