发布会回(huí )应】7月(yuè )16日,上(shàng )海市疫情(qíng )防控工(gōng )作领(lǐng )导小组(zǔ )专家(jiā )组成员袁政安表(biǎo )示,本次疫(yì )情主(zhǔ )要由于相(xiàng )关感染者的(de )聚(jù )集活动,因(yīn )在(zài )相对密闭(bì )的空(kōng )间内共(gòng )同暴露而导(dǎo )致(zhì )感染并(bìng )传(chuán )播。#上海新增本土确诊5例(lì )无(wú )症状28例#
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