Serrana, Brazil...75 pct vaccinated...per AlJazeera Newshour.

[roamer65]

The SARS-CoV-2 infection rate is dropping VERY quickly. Schools are back in session. Businesses are moving there due to the stability.

75 pct seems to be the minimum number for “herd immunity” via vaccination.

[muriel_volestrangler]

1. BBC article:

Brazil Covid: Deaths plunge after town's adults vaccinated

The findings suggest the pandemic can be controlled after 75% of people are fully dosed.
...
The experiment in Serrana, in the south-eastern São Paulo state, was carried out between February and April by Instituto Butantan, which produces the CoronaVac vaccine developed by China's Sinovac Biotech.

The city was divided into four areas to help determine the threshold for containing the virus. The team said this was achieved after three areas, or about 75% of the population over the age of 18, had been given both doses.

When 95% of adults were fully vaccinated, they said the results showed that:

Deaths fell by 95%
Hospitalisations fell by 86%
Symptomatic cases fell by 80%
Ricardo Palacios, research director at Butantan, said the key figure was the 75%.

https://www.bbc.co.uk/news/world-latin-america-57309538