发(fā )布会回(huí )应】7月(yuè )16日,上海市疫情防(fáng )控工作领(lǐng )导小组(zǔ )专(zhuān )家(jiā )组(zǔ )成员(yuán )袁(yuán )政安(ān )表示,本次疫(yì )情主(zhǔ )要由(yóu )于(yú )相关感染者的聚(jù )集活动,因(yīn )在相对密闭的空(kōng )间内共同(tóng )暴露而导(dǎo )致感染(rǎn )并(bìng )传播。#上海新增(zēng )本土(tǔ )确诊5例无症状28例(lì )#
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