VOICED : Pfizer/BioNtech dice que su vacuna es eficaz contra ómicron tras "tres dosis"

The Pfizer and BioNTech COVID-19 vaccine is effective against the Omicron variant after three doses, as reported by BioNTech. Two doses provide protection against severe disease, but a third dose is needed to achieve antibody levels that neutralize Omicron. BioNTech is working on a vaccine adapted to virus alterations, expected by March. Omicron, highly transmissible, was first detected in South Africa in November and has spread rapidly, causing concern worldwide.

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