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Five reasons why COVID herd immunity is probably impossible
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imakita_corp 2021/03/21
日本の115歳未満人口は1559万2千人で，前年に比べ18万8千人の減少となり，割合は12.3％ / 18歳未満19,313,200で15％強

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The devastating biological consequences of homelessness
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imakita_corp 2019/05/23
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