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domingo, abril 28, 2024
InicioNacionalSaludLas vacunas pierden eficacia contra la infección pero siguen evitando la covid...

Las vacunas pierden eficacia contra la infección pero siguen evitando la covid grave y la muerte

Varios países detectan que la protección de las inyecciones cae con el tiempo, pero los inmunizados tienen 29 veces menos riesgo de hospitalización que los que aún no se han pinchado

La variante delta del coronavirus ya es dominante en muchos países y las estadísticas empiezan a mostrar indicios de que las vacunas están perdiendo algo de eficacia pasados ocho meses o más.

Pero un análisis detallado de los datos deja claro que estas vacunas son claves para la lucha contra la pandemia, ya que siguen evitando que los ciudadanos ingresen en el hospital con covid y que puedan morir por ello.

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Los datos más preocupantes llegan de Israel. Hace unos días, un trabajo preliminar y no revisado por expertos independientes aseguraba que las vacunas están perdiendo eficacia contra la infección, de forma que los que se vacunaron en enero tienen más riesgo de contagiarse que los que lo hicieron en marzo.

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Esta semana, otro estudio preliminar, también en Israel, muestra que la gente que recibe una tercera dosis tiene 11 veces más protección contra la infección. Ya en julio el ministerio de salud del país alertó de que la eficacia de la vacuna de ARN contra la infección sintomática había bajado al 64%, lejos del 94% registrado en los ensayos clínicos realizados antes de la llegada de la delta.

SourceEl Pais
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