?:authorAffiliation
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[\'Hebei Provincial Center for Disease Control and Prevention, Shijiazhuang, Hebei, China.\', \'Sinovac Biotech, Beijing, China.\', \'National Institutes for Food and Drug Control, Beijing, China.\', \'Beijing Key Tech Statistics Technology, Beijing, China.\', \'Renqiu City Center for Disease Control and Prevention, Renqiu, Hebei, China.\', \'Sinovac Life Sciences, Beijing, China.\', \'Hebei Provincial Center for Disease Control and Prevention, Shijiazhuang, Hebei, China. Electronic address: yuliang_zh1@163.com.\', \'Sinovac Biotech, Beijing, China. Electronic address: yinwd@sinovac.com.\']
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