COVID-19感染リスクは年齢によらない――北大

doctor in the laboratory with a blood tube for analysis and sampling of Coronavirus under the microscope / microbiologist with a tube of blood analyzed under a microscope and contaminated by Coronavirus with label covid-19
doctor in the laboratory with a blood tube for analysis and sampling of Coronavirus under the microscope / microbiologist with a tube of blood analyzed under a microscope and contaminated by Coronavirus with label covid-19
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