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Table 1 Country-specific data showing number of PCR tests and cases per million inhabitants and corrective factor ρ = a/b

From: Impact of lockdown on Covid-19 case fatality rate and viral mutations spread in 7 countries in Europe and North America

  Italy Spain France Germany UK Sweden USA
PCR Tests/1 M inhabitans (a) 36244 41332 16856 30400 19026 11833 22545
Cases/1 M inhabitans (b) 3505 5311 2596 1984 2807 2250 3665
Corrective factor (ρ) 10.34 7.78 6.49 15.32 6.78 5.26 6.15