LESS THAN a year after covid-19 spread across the world, scientists have produced several vaccines that may offer high immunity. But mass inoculation is months away. Until then people must contain the virus by wearing masks, travelling less and limiting contact with other households. Politicians who thought their citizens would stop socialising of their own accord have been disappointed. America's daily deaths are near record highs as the virus runs amok. Europe's cases surged in October, causing 11 governments to reimpose national stay-at-home orders. They hope these lockdowns will reduce infections to manageable levels for Christmas. But after a grim spring, they must worry that people will be less compliant this time around.
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