张文宏:我国疫苗覆盖率低会出现“免疫缺口” https://www.sohu.com/a/453698819_115479 (水城百事)
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急什么,加拿大才打几个
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厉害,中国保护的太好,这里毫无保护。下飞机隔离自己先把行李送回去再去隔离
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