Recent cases in which recovered Covid-19 patients were infected a second time with a new strain also raise the question of how long vaccines might last. Photo: Reuters Recent cases in which recovered Covid-19 patients were infected a second time with a new strain also raise the question of how long vaccines might last. Photo: Reuters
Recent cases in which recovered Covid-19 patients were infected a second time with a new strain also raise the question of how long vaccines might last. Photo: Reuters

Explainer |
Coronavirus vaccine race: where are we and how far?

  • Here’s an update on the quest for a magic bullet against Covid-19 that has already killed more than a million people worldwide
  • Firms backed by their governments in China, Russia and the US are racing to be the first across the finish line

Topic |   Coronavirus pandemic
Recent cases in which recovered Covid-19 patients were infected a second time with a new strain also raise the question of how long vaccines might last. Photo: Reuters Recent cases in which recovered Covid-19 patients were infected a second time with a new strain also raise the question of how long vaccines might last. Photo: Reuters
Recent cases in which recovered Covid-19 patients were infected a second time with a new strain also raise the question of how long vaccines might last. Photo: Reuters
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