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FDA advisers recommend a new COVID vaccine to address waning protection and emerging variants.
The FDA advisers recommend a new COVID vaccine, targeting a new virus version, due to the waning protection of last year's shots.
The effectiveness of the old vaccine peaked at 52.2% for infection prevention and 66.8% for hospitalization prevention after four weeks, dropping to 34.6% and 44.4% after ten weeks.
The new vaccine aims to boost immunity and protect against emerging SARS-CoV-2 variants.
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Los asesores de la FDA recomiendan una nueva vacuna COVID para abordar la disminución de la protección y las variantes emergentes.