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AP EEUU autoriza refuerzos COVID enfocados en nuevas variantes EEUU autoriza refuerzos para COVID-19 enfocados en variantes más recientes y las inyecciones podrían comenzar en unos días CORONAVIRUS-EEUU-REFUERZO (AP) Estados Unidos autorizó el miércoles su primera actualización de las vacunas contra el COVID-19, con dosis de refuerzo enfocadas en la cepa de ómicron más común en la actualidad. Las inyecciones podrían comenzar en unos días.
La decisión de la Administración de Alimentos y Medicamentos (FDA) modifica la fórmula de las vacunas fabricadas por Pfizer y su rival Moderna , que ya han salvado millones de vidas. La esperanza es que los refuerzos modificados frenen otra oleada invernal.
“Me verán al frente de la fila”, declaró a The Associated Press el doctor Peter Marks, jefe de vacunas de la FDA, poco antes de que su agencia autorizara las nuevas dosis.
Hasta ahora, las vacunas contra el COVID-19 se han centrado en la variante original del coronavirus, aunque hayan aparecido mutantes muy diferentes. Las nuevas vacunas de refuerzo en Estados Unidos son combinadas o “bivalentes”. Contienen la mitad de la fórmula de la vacuna original y la mitad de la protección contra las versiones más recientes de ómicron, denominadas BA.4 y BA.5 , que se consideran las más contagiosas hasta el momento.
La combinación pretende aumentar la protección cruzada contra múltiples variantes.
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