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Covid-19: should we be concerned about air conditioning?
Following on from several listener questions about the role of air conditioning in spreading or dissipating Covid-19 in buildings and on public transport, Hannah Devlin asks Dr Lena Ciric whether we should be turning our AC systems on or off. Help support our independent journalism at <a href="https://www.theguardian.com/sciencepod">theguardian.com/sciencepod</a>