China Tests Thousands to Calculate True Spread of Coronavirus
- Serological surveys can show who has immunity in a population
- Knowing the true scale of outbreak key to re-opening economies
Source: Feature China/Barcroft Media via Getty Images
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When Tiger Ye caught the coronavirus in January, his mother and grandmother nursed him back to health. Later that month, both women developed fevers, but with Wuhan’s hospitals overflowing they chose instead to bear it out at home.