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Moderna doses first patients in COVID-19 vaccine booster trial – The Science Board

Moderna has dosed the first patients in its study of modified COVID-19 vaccines, designed to address the potential need for vaccine booster candidates.

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The new candidate, messenger RNA (mRNA)-1273.351, encodes the prefusion stabilized spike protein of the SARS-CoV-2 variant B.1.351, first identified in South Africa, and is being assessed as a booster vaccine to increase the response to emerging SARS-CoV-2 variants. The company is also investigating a second, multivalent candidate, mRNA-1273.211, that is a combination of mRNA-1273 and mRNA-1273.351.
Through a phase II clinical trial amendment, the company will enroll 60 participants previously vaccinated…

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