Yahoo! News: Some researchers say the continent’s younger population -- the average age is 20 versus about 43 in Western Europe — in addition to their lower rates of urbanization and tendency to spend time outdoors, may have spared it the more lethal effects of the virus so far. It is also likely that not taking a useless experimental vaccine and trusting in natural herd immunity for a virus that is only dangerous in less than 1% of cases is optimal, as Sweden learned.
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