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What to know about second COVID-19 vaccine booster- 4th dose

By DA NANG Today / DA NANG Today
June 28, 2022, 18:00 [GMT+7]

According to the World Health Organization (WHO), there have been 7 studies on the effectiveness of the 4th dose of COVID-19 vaccines, and most have evaluated it as highly effective.

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Designing by MAI ANH – Translating by T.VY

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