Doctors forced to wear garbage bags to protect themselves from deadly microscopic organisms may be one of the most enduring images of the Covid-19 pandemic. Likewise, the need for tens of millions of nasopharyngeal swabs to test people at the same time, when there were only two major manufacturers in the world, was a rude awakening.

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That’s when stories of how 3D printing was being effectively deployed at short notice to make crucial medical equipment went viral. Even General Motors and Volkswagen went from making cars to face masks and ventilators, using 3D printing. Others joined in.

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