Prognosis
Delta’s Spread Is Testing Even Aggressive ‘Covid Zero’ Defenses
- Beijing sees first local case in 6 months as China challenged
- Variant has breached Australia’s strict quarantine defenses
Covid-19 testing in Nanjing, on July 21.
Photographer: STR/AFP/Getty Images
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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.
An outbreak that started at an airport in the eastern Chinese city of Nanjing is testing that country’s zero-tolerance measures, which are some of the most sweeping and comprehensive in the world.