A nationwide U.S. study of more than 893,000 adults provides solid evidence confirming that mRNA booster immunizations extend protection against moderate and severe COVID for four to five months. These findings, published in The BMJ, provide a more complete understanding of the effectiveness and durability of third and fourth doses of the mRNA vaccines, informing policymakers and providing individuals with confirmation of the importance and value of boosters.
Large US study confirms that mRNA boosters extend COVID-19 protection but wane over time
