They’re evolving.

 They work as advertised, meaning they usually prevent severe illness and death, but they do not deliver what is known as “sterilizing immunity.”

“They’re evolving. Even the delta variant, we have two sublineages we are monitoring,” Van Kerkhove said. “Everyone is fixated on the delta, but we should be prepared for more.”

“They’re evolving. Even the delta variant, we have two sublineages we are monitoring,” Van Kerkhove said. “Everyone is fixated on the delta, but we should be prepared for more.”

Janis Orlowski, chief health-care officer of the Association of American Medical Colleges, offers one version of Scenario B: “Delta goes on to epsilon which goes on to lambda, and that becomes another ugly virus. . . . The virus mutates to a strain that we are not effectively vaccinated against — and that leads us into another ugly year.”

ワクチンが死亡や重症化を防いでくれているから、もしかすると、流行病程度になるかもしれないが、ウイルスが進化してワクチンが効かなくなる可能性もーー少ないがー皆無ではない、と。

Sterilizing immunity means that the immune system is able to stop a pathogen, including viruses, from replicating within your body.

絶滅させることはできないんでしょうね。