Covid-19 roundup: Moderna says vaccine safe, effective in adolescents; CEPI backs a synthetic biology vaccine for PhIII

American adolescents may soon have not one, but two (nearly identical) Covid-19 vaccines to choose from.

Moderna announced Tuesday that their vaccine was safe and appeared effective in a trial of 3,700 kids between the ages of 12 and 17. The vaccine induced a similar immune response to those seen...

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