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【新型コロナ】「日本のコロナの謎」　検査不足か健闘か、欧米注視
https://egg.5ch.net/test/read.cgi/scienceplus/1585114410/327,363,364,410,411

BCG接種率
https://i1.wp.com/promea2014.com/blog/wp-content/uploads/2020/03/73efcde9e811670fb27f892c1fe6bdda.png