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Fig. 3 | BMC Infectious Diseases

Fig. 3

From: Changes in the intrinsic severity of severe acute respiratory syndrome coronavirus 2 according to the emerging variant: a nationwide study from February 2020 to June 2022, including comparison with vaccinated populations

Fig. 3

Monthly age-standardized mortality rate per 1,000,000 by period regarding vaccination and circulating variants of SARS-CoV-2. Monthly age-standardized mortality rate: (number of deaths among confirmed cases in a specific period/population of December 2021 *1,000,000)/months (standard population: whole population)

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BMC Infectious Diseases

ISSN: 1471-2334

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