Which Americans are least likely to get vaccinated against covid-19? Our statistical model, built using demographic profiles of 24,000 people, shows the single biggest predictor of those who refuse the jab is whether that person voted for Donald Trump. But many social, educational, medical and other factors explain why some states are far behind others in inoculation efforts. In England, meanwhile, a bold decision to scrap most lockdown measures appears to have coincided with a sharp fall in infections. Sometimes gambles pay off.
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