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Russia proposes Pfizer test Sputnik Light as Covid booster shot after report of mRNA vaccines’ lowered efficacy against Delta

The offer was made through Sputnik V’s official Twitter account, which is managed by the Russian Direct Investment Fund (RDIF). The state-run agency bankrolled the vaccine’s development and handles its promotion overseas. “Today RDIF offers Pfizer to start trial with Sputnik Light as booster,” the statement read. Sputnik Light is …

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