除去境外输入病例，北京保持零本土新增新冠病毒病例已经58天。
北京市原定下周一中小学就会开学。正当人们都开始安下心来，生活也逐渐回归正轨，新京报的一则报导让人们重新忧心忡忡。
据新京报12日报道，北京新发地批发市场进口三文鱼的切割案板被检测出了新冠病毒。这则新闻一被发表，就引起了网友们的恐慌和激烈讨论。
随着事态发展，经过对相关人士的检测，有关部门又发现了45个无症状新冠病毒感染者，北京中小学的开学时间也被推迟了。
“北京市疾控中心副主任庞星火说，经流行病学调查，这些病例均有新发地农产品批发市场活动史，通过采集确诊病例相关的外环境标本，有核酸检测阳性报告。经初步判断，这些病例可能接触了市场中污染的环境、或接触到了被感染的人员而传染发病，后续不排除出现续发病例的可能。
The epidemiological investigation on the cases reveals that they share an activity history at the Xinfadi market, said Mr Pang Xinghuo the Deputy of the Centre for Disease Control of Beijing. The exo-environmental specimen of the confirmed cases has been collected and tested positive upon a nucleic acid test. The cases are initially judged to have been exposed to contaminated environment in the market or contacted by other infected cases. Appearance of secondary cases cannot be ruled out at this moment.
庞星火表示，北京市、区疾病预防控制中心已组织专业人员，在全市开展了农贸批发市场、大型超市等排查，共采集海鲜、肉类等食品及外环境涂抹标本5424份，完成新冠病毒核酸检测，新发地市场发现40件环境阳性样本，其余农贸批发市场、大型超市均为阴性。
According to Mr Pang, the CDC of Beijing has organized professionals to conduct an investigation over all the farmers’ wholesale markets and supermarket in Beijing. A total of 5424 streak preparations of seafood and meat products and external environment have been collected and tested for COVID-19. 40 specimens from Xinfadi market have been tested positive while all the others are negative.
庞星火介绍，在对从业人员主动筛检中，对1940名市场从业人员进行了核酸检测，在新发地采集的517件样品中，有45人咽拭子阳性，另在海淀一农贸市场中发现1例阳性，是1例新发地确诊病例的密切接触者。上述46人目前无临床症状，已纳入严密管理和观察中。”
Mr Pang also said that during active screening of workers, 1940 workers in the market industry have undergo nucleic acid testing. Out of 517 specimen collected at Xinfadi market, 45 workers’ throat swabs are tested positive for COVID-19. One other case at another market in Haidian District, who was in close contact to a Xinfadi case has also been tested positive. All the 46 cases show no symptoms and are under close management and observation.
消息来源：新华网
虽然出现了新病例，但这并不意味着疫情就会复燃。
北京市的相关部门已经采取积极措施，加强病毒检测、追溯病毒源头两头抓。相信在医护人员以及检测工作者的辛勤劳动以及相关人士的配合之下，北京不会出现两个月前的状况。
不过在更加具体的报告出现前，我们出各种生鲜食品一定要经过高温杀菌后再食用，已防万一。
参考资料：http://www.xinhuanet.com/politics/2020-06/13/c_1126110597.htm