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25 de abril de 2024
coronavirus, te queda poco
La vacuna de la Universidad de Oxford genera anticuerpos y parece "segura" martes 21 de julio de 2020 10:16
La vacuna contra el coronavirus que desarrolla la universidad británica de Oxford parece "segura" y genera anticuerpos, según el resultado de las primeras dos fases del estudio, que fue dado a conocer este lunes.
Durante los ensayos clínicos realizados por especialistas, 1.077 voluntarios mostraron con una dosis generaban anticuerpos y células blancas de la sangre que pueden combatir el covid-19.
Estos descubrimientos, difundidos en la revista médica The Lancet, se consideran "muy prometedores", si bien todavía es necesario llevar a cabo ensayos a mayor escala a fin de determinar si los anticuerpos son suficientes para ofrecer protección a largo plazo contra la enfermedad.
"Todavía queda mucho trabajo por hacer antes de que podamos confirmar si la vacuna ayudará a manejar la pandemia, pero estos primeros resultados son prometedores ya que se puede producir a gran escala", aseguró Sarah Gilbert, investigadora de la Universidad de Oxford. "Además de continuar probando nuestra vacuna en ensayos de fase 3, necesitamos aprender más sobre el virus; por ejemplo, todavía no sabemos qué tan fuerte es la respuesta inmune que debemos provocar para proteger eficazmente contra la infección por SARS-CoV-2", agregó. La primera fase del ensayo comenzó en abril e incluyó al menos 1.000 voluntarios adultos, mientras que ahora se está probando en 10.000 voluntarios, incluidos personas mayores de más de 70 y niños de de 5 a 12 años. Mientras tanto, el Reino Unido anunció este lunes que ya ordenó 100 millones de dosis de la vacuna.
La fórmula, denominada AZD1222, está siendo elaborada por AstraZeneca en colaboración con científicos de la Universidad de Oxford.
La firma anticipó que una fase 3 de los ensayos de su vacuna potencial se está llevando a cabo actualmente en Reino Unido, Brasil y Sudáfrica, y que empezará pronto en Estados Unidos.