小学生のコロナ感染リスクに近隣の社会経済環境が関連――大阪市での研究

Group of Asian students in school building checked and scanned for temperature check. Elementary pupils are wearing a face mask and line up before entering into classroom. Covid-19 school reopen
Group of Asian students in school building checked and scanned for temperature check. Elementary pupils are wearing a face mask and line up before entering into classroom. Covid-19 school reopen
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