Nearly all adults in a Brazilian town were inoculated as part of a study. Preliminary results showed that symptomatic cases of covid-19 and deaths fell by 80% and 95%, respectively
But Serrana was given a way out. Between February and April, all adults were offered jabs as part of a study by the Butantan Institute, which produces CoronaVac, a vaccine developed by Sinovac, a Chinese firm. More than 95% ofgot jabbed, despite Jair Bolsonaro, the president, claiming that it was unsafe. Preliminary results released on May 31st showed that symptomatic cases and deaths fell by 80% and 95%, respectively. Only two covid-19 patients remain hospitalised in the local clinic .
Serrana is a tantalising glimpse of an alternative reality in Brazil—one in which Mr Bolsonaro did not squander his chances to mount an effective public-health campaign and, later, to buy vaccines. But the study also has global implications. In phase three trials, CoronaVac had efficacy rates as low as 50%, the minimum required by the. The lower the efficacy, the higher the share of people who must be jabbed to slow contagion. The trial in Serrana sought to discover that share.
These results could boost vaccine uptake across Brazil, hopes Ethel Maciel, an epidemiologist. But 75% is a long way off. Only 11% of Brazilians are fully vaccinated, and the rate has slowed because of a shortage of ingredients for CoronaVac, which are imported from China. Chile, which has vaccinated 45% of its population, mostly with CoronaVac, is also suffering near-record cases.
But Serrana itself has become an oasis. On a recent morning, children ran round a fountain in the plaza. Across the street a fabric shop that caters to elderly women had a steady stream of customers. A gang of old men occupied their usual benches. They discussed Mr Bolsonaro’s decision to host the Copa América, a football tournament, even though a third wave seems imminent. “Stupid,” a 97-year-old said. Half of them scattered when an outsider showed up.
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