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Brazil, I believe, received a complete cargo of Sputnik that was contaminated with the flu.
EDIT: I used to be improper. It was a chilly virus that may be a regular a part of the vaccine, besides that the virus was presupposed to be unable to breed. As an alternative, the virus was discovered to have restored that operate. Life, uh, finds a method.
https://www.france24.com/en/live-news/20210428-brazil-says-russian-covid-vaccine-carried-live-cold-virus
In response to a slideshow uploaded on-line, scientists at Anvisa, Brazil’s regulator, mentioned they examined samples of the booster shot and located it was “replication competent” — which means that after contained in the physique, the adenovirus can proceed to multiply.
They added that this had possible occurred due to a producing drawback known as “recombination,” by which the modified adenovirus had gained again the genes it wanted to duplicate whereas it was being grown inside engineered human cells in a lab.
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