the United States is experiencing a sharp rise in Covid cases. Its daily average on Christmas of roughly 201,000 daily cases, according to The New York Times’s coronavirus tracker, exceeds the average case load during this summer’s peak, which was attributed to an earlier variant of the virus known as Delta.

…para abril 2022 qué nombre y cómo será la variante cuatrimestral?

De eso ya deberían estar hablando muchos laboratorios: es una carrera y hay que adelantarse al bicho, o no vamos a salir de esta ni en el 2025