Viral vector and mRNA vaccines, including Russia's Sputnik V, provide enough protection against the new Delta strain of the coronavirus, albeit to a lesser extent, reported The Times of India.
The observation was made by Sergey Netesov, head of the Novosibirsk State University's Laboratory and member of the Russian Academy of Sciences.
They offered 95% protection against the initial strain and now they give 90% protection against the Delta variant, Netesov said.
Sputnik V uses two different engineered adenoviruses (rAd26 and rAd5 for the first and second doses, respectively) to deliver the genetic code for the spike protein of SARS-CoV-2.
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