As health experts keep reminding us, life will not return to anything resembling pre-pandemic normal until there is an effective and widely available coronavirus vaccine. And, as they also keep reminding us, it will take at least a year to do the testing and clinical trials necessary to ensure a vaccine candidate is safe for mass production.

So it’s more than a little unsettling that President Donald Trump’s effort to expedite a vaccine for Covid-19 has a shortened timeline, one that seems suspiciously connected to the political calendar rather than sound science...

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