According to the study published on the MedRxiv site, which includes research on health science, CoronaVac and AstraZeneca vaccines, which were introduced to healthcare workers and the elderly in high risk group in Brazil at the beginning of this year, reduced the mortality rate in people aged 80 and over due to Covid-19.
CoronaVac constituted 77.3 percent of the Covid-19 vaccines applied in the country and AstraZeneca 15.9 percent.
At least one dose of Covid-19 vaccine was administered to 49.1 percent of people over the age of 80 until mid-February, and to more than 90 percent after March.
While deaths aged 80 and over in January and February were at the level of 25 percent, in the first two weeks of April the rate decreased by 13.1.
From the beginning of this year to the middle of February, virus-related deaths in the 80-year-old and over group were 13 times higher than the 0-79 age range, while in the first two weeks of April they declined by about 7 times.
Brazil, where the most deaths from Covid-19 were experienced in the world after the USA, is having a hard time due to the spread of P1, the faster transmitted type of Covid-19, which is thought to have emerged in the city of Manaos, in the Amazonas state of the country in January.
Covid-19, which cost the lives of 406 thousand 437 people in the country, has been seen in 14.7 million people to date.