Graphic detail | The Delta delta

Jabs mostly fend off the Delta strain but breakthroughs are infectious

A new British study also finds that immunity wanes over time

ON AUGUST 18TH America’s surgeon general announced that people who got covid-19 vaccines at least eight months ago can receive an extra shot. Israel has already given a third jab to many citizens. France and Britain are also considering boosters.

This article appeared in the Graphic detail section of the print edition under the headline "The Delta delta"

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