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 in adults and no symp­to­matic cas­es were seen in kids af­ter their sec­ond dose, com­pared with 4 in the place­bo group, “con­sis­tent with a vac­cine ef­fi­ca­cy of 100%,” Mod­er­na said.

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