Dos subvariantes de Omicron - BA.4 y BA.5 - están impulsando el crecimiento de las infecciones por COVID-19 este verano al convertirse en las cepas de coronavirus dominantes en los EE.UU. Estas variantes constituyen ahora el 52,3% de las infecciones.
La Administración de Seguridad en el Transporte informa de niveles récord de revisiones en los aeropuertos estadounidenses durante el largo fin de semana festivo que superan las cifras alcanzadas antes de la pandemia de COVID-19.
El doctor Anthony Fauci, principal asesor médico del presidente Joe Biden, dijo el martes que pasó por un "rebote de Paxlovid" que puede ocurrir después de tomar el antiviral para recuperarse del COVID-19.
La noticia de que una veterinaria en Tailandia se infectó con COVID por un gato al que estaba tratando plantea nuevas preguntas sobre el riesgo de transmisión de animal a humano.
El gobierno federal está planeando un posible aumento de los casos de COVID-19 este otoño y está reservando 3.200 millones de dólares para 105 millones de dosis de la vacuna de Pfizer Inc.
A medida que el coronavirus sigue evolucionando, se espera que subvariantes de Omicron como BA.4 y BA.5 provoquen muchos casos de COVID-19 este verano.
Pfizer y BioNTech han anunciado que sus dos vacunas dirigidas a Omicron son seguras y eficaces contra el coronavirus, incluidas las últimas subvariantes de Omicron. Esta nueva formulación podría utilizarse como una cuarta inyección -o un segundo refuerzo- para proteger mejor contra otra oleada de coronavirus prevista para este otoño e invierno.
Aunque las nuevas subvariantes de Omicron han provocado un nuevo aumento de los casos de coronavirus en Estados Unidos en las últimas semanas, las muertes se han mantenido en los niveles más bajos de la pandemia.
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