COVID-19 vaccine, one of the authors said, adding further fuel to a dispute surrounding the "Sputnik-V" shot.Fifteen scientists from five countries signed the letter presenting their concerns to the international medical journal, Enrico Bucci, biologist adjunct professor at Philadelphia's Temple University, told Reuters.Reuters did not see the contents of the letter.
The move nonetheless highlights growing concern among scientists about the safety and efficacy of the Sputnik-V vaccine, which the government approved for use before completing full human trials.The official letter came days after a larger group of scientists - including the 15 - signed an open letter to the Lancet's editor, published on Bucci's personal blog, after the journal.
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