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How Delta is breaching even the most effective anti-Covid defences

Authorities in many countries, not least China, have had to rethink their vax campaigns

29 July 2021 - 19:46 By Bloomberg News

The rise of the highly contagious Delta variant is challenging even the most aggressive Covid-19 containment regimes, an ominous sign as economies look to open up and return to pre-pandemic life...

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