Moderna: Vaccine 93% effective up to 6 months but booster likely needed before winter

Moderna: Vaccine 93% effective up to 6 months but booster likely needed before winter

Moderna’s COVID-19 vaccine remained 93% effective against symptomatic illness six months after the second dose, but amid the ongoing spread of the highly contagious delta variant, the company said it believes a booster dose will be necessary prior to the winter season.

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