HomeNewsWorld NewsThe study found that the lifespan of a booster dose was only...

The study found that the lifespan of a booster dose was only three months

Washington: The effectiveness of third-dose MRNA vaccines such as Pfizer and Modena will begin to decline by the fourth month, according to a U.S. Centers for Disease Control and Prevention study.

The CDC says the new findings suggest that an additional dose or a fourth dose may be needed to ensure public safety. Although complete vaccination has not been achieved in many countries, only a few countries have released boosters.

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