"95 percent reduction in Covid-19 deaths since almost all adults were vaccinated in Serrena, Brazil"
Serrana, with a population of 45,000 people, is a healthy oasis in Brazil, which is experiencing the world's second deadliest outbreak, with over 461,000 deaths so far and a poor immunisation rate due to a scarcity of vaccines.
Serrana was the topic of a study conducted by Instituto Butantan, the Brazilian manufacturer of the Coronavac vaccine created by Sinovac Biotech of China.
When vaccination began, the city saw a surge in Covid cases, but once 75 percent of the population was immunised, the virus was contained, according to scientists.
Scientists separated the city into four parts to figure out what the threshold was for containing the virus's spread, and discovered that it was under control after three areas received the second treatment.
Serrana is surrounded by cities where Covid cases are still on the rise. Ribeirao Preto, 15 miles from Serrana, is under lockdown in an attempt to halt the spread of Covid-19.