Virus-afflicted 2020 looks like 1918 despite science's march

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. 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.

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