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#herd immunity

A nurse goes to check on a Covid-19 patient in the intensive care unit of the Timone hospital in Marseille, southern France on January 5, 2022. Photo: Nicolas Tucat / AFP
A nurse goes to check on a Covid-19 pati... […]

Omicron less severe but still a threat to health systems

Omicron is causing record numbers of cases around the world, and though it causes less severe Covid-19 experts warn this wave still threatens to overwhelm health systems