Omicron Covid variant – what do we know?

Health Check - A podcast by BBC World Service - Wednesdays

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Omicron Covid variant – what do we know? Claudia examines key questions about the new variant with Professor of Molecular Virology, Jonathan Ball. Plus growing evidence that pollution has a negative effect on our mental health. And a new way of testing for TB in children.Presenter: Claudia Hammond Producer: Erika Wright(Image: Microscopic view of influenza virus cells. Photo credit: Panorama Images/Getty Images.)