Despite a century’s progress in science, 2020 is looking a lot like 1918. In the years between two lethal pandemics, one the misnamed Spanish flu, the other Covid-19, the world learned about viruses, cured various diseases, made effective vaccines, developed instant communications and created elaborate public-health networks.

Yet here we are again, face-masked to the max. And still unable to crush an insidious yet avoidable infectious disease before hundreds of thousands die from it.

In 1918, no one had a vaccine, treatment or cure for the great flu pandemic as it ravaged the world and killed more than 50 million people. No one has any of that for the coronavirus, either.

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