We are all playing Covid roulette. Without clean air, the next infection could permanently disable you | George Monbiot As rich people plough money into ventilation to protect themselves, those with long Covid are treated as an embarrassment, says Guardian columnist George Monbiot the Guardian

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There’s a powerful argument that just as cholera was stopped by cleaning the water, Covid will be stopped by cleaning the air. The virus thrives in badly ventilated, shared spaces – especially classrooms, where students sit together for long periods. One study found that mechanical ventilation systems in classrooms reduce the infection risk by 74%.

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