All over the world, engineers and companies have been going back to the drawing board to think up innovative solutions to fight Covid-19 or a dreaded second wave of the pandemic. Our reporters went to visit two French businesses – one large-scale enterprise, one family firm – which have found ingenious solutions to destroy the virus or protect people from it. Both companies are already starting to export their inventions. Catherine Norris-Trent, Jade Lévin and Wassim Daly have the story.

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