The vaccine against covid-19 developed by the pharmaceutical company Pfizer offers protection against the disease for at least six months after taking the second dose. This is the conclusion of a study presented this Thursday, which also guarantees protection against the already identified variants of the virus.
As for efficacy, the vaccine remains more than 91% effective against the disease, having proven to be totally effective against variant B.1.351, initially identified in South Africa, and which proved to be more contagious. Additionally, it has also been shown to be effective against the other mutations already found.
The vaccine was 100% effective against serious complications, according to the parameters of the United States Center for Disease Control and Prevention “, the company said in a statement.
Pfizer stresses that the new data reinforces confidence in the product, which was the first to be approved for use in the United States and the European Union.
The company conducted a study of 46,000 volunteers, having noted 927 confirmed cases of covid-19. Of these cases, 850 were on placebo, with the rest being part of the group with a 91.3% effective vaccine.
The 32 severe cases were seen in the placebo group, which indicates 100% effectiveness against serious illness “, informed the company.
Regarding the South African variant in particular, and in a study with 800 people, all cases diagnosed with covid-19 were from people who were on a placebo, which guarantees 100% efficacy against the variant.
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