发布(bù )会(huì )回应】7月16日,上海市疫(yì )情(qíng )防控(kòng )工作(zuò )领(lǐng )导(dǎo )小组专家(jiā )组成(chéng )员(yuán )袁政安表示(shì ),本次(cì )疫情(qíng )主(zhǔ )要由于相关感染者的聚集活动(dòng ),因在相对密闭的空(kōng )间内共(gòng )同暴露而(ér )导(dǎo )致感(gǎn )染(rǎn )并传(chuán )播(bō )。#上(shàng )海新增本土确诊5例无症状28例(lì )#
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