３回にすべきか、２回で十分か？

 

The boosters for older people began to be offered just over a month ago, and they appear to be now taking effect, with hospital admissions levelling off in that group.

"This is leading to a halt in the Delta wave," Prof Segal said.

Early data suggests a tenfold increase in protection from infection and severe disease after the third jab, compared with after two.

Dr Anat Ekka Zohar, who is leading the booster programme study, said three doses were "highly protective, against both infection and severe illness".

She added: "The triple dose is the solution to curbing the current infection outbreak."

It could be that a three-shot schedule is what's needed, as in the case of the hepatitis B vaccine, where three doses result in more or less lifelong protection for most.

Or it could be that two jabs plus natural immunity will be enough.

イスラエルの場合四〇代以上三回うって感染、重症化に対して効果があった、と。 B型肝炎と同じで三回ワクチンで生涯持続する抗体ができるのか、それとも二回で十分か？

二回だと感染しても軽症だから、それで自然免疫ができるからそれでもいいのじゃないか、という意見も。

日本の場合、検討する時間はまだまだあるからね。