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https://www.chinacdc.cn/jkzt/crb/zl/szkb_11803/jszl_13141/202402/t20240206_272824.html

https://covid.cdc.gov/covid-data-tracker/#variant-proportions

结论（暴论）xbb的疫苗已经没必要打了，辉瑞应该尽快推出90天无理由退货