Deliveryman who sends 50 orders per day confirmed with COVID-19
A food delivery driver who delivered an average of 50 orders per day was among the confirmed Covid-19 cases reported on Sunday in Beijing, the local health authority revealed on Tuesday, raising concerns about further spread of the disease in the Chinese capital.
Zeng Xiaopeng, director of the Beijing municipal center for disease prevention and control, said at a press conference that the patient was a 47-year-old who worked as a food deliveryman for the Alibaba Group Holding Ltd.-owned platform Ele.me.
Major food delivery platform Eleme requires new registered riders in Beijing to hold nucleic acid test negative results before accepting orders
Since Jun. 1, the driver had visited a number of restaurants, grocery stores and shopping malls across the south and east of the city. On Sunday, he was picked up by an ambulance and transferred to a hospital’s fever department for Covid-19 testing. He tested positive that day, according to Zeng.
There was no new COVID-19 case reported in Tianjin on 23 of June. So far, of all the 61 imported cases, 59 have been discharged upon recovery and 2 are still hospitalized. -No imported suspected cases are undergoing test.-No new locally transmitted cases or suspected cases were reported.-6 asymptomatic infection cases are undergoing medical observation right now 天津无新增 6月23日6时至24日6时，我市无新增报告境外输入新冠肺炎确诊病例。累计报告境外输入确诊病例61例（中国籍57例、美国籍2例、法国籍1例、菲律宾籍1例），治愈出院59例，在院2例（其中轻型1例、普通型1例）。6月23日6时至24日6时，我市无新增报告本地新冠肺炎确诊病例。累计报告本地新冠肺炎确诊病例137例，其中男性74例，女性63例；治愈出院133例，死亡3例，在院1例（为普通型）。我市无新增无症状感染者。累计26例（境外输入25例），其中解除医学观察17例、尚在医学观察6例、转为确诊病例3例。截至目前，全市无现存疑似病例，累计排查密切接触者4476人，尚有576人正在接受医学观察。截至6月23日16时，全市排查涉及疫情新发地区活动人员10685人，其中具有暴露史人员1879人，均采取集中隔离医学观察，已完成核酸检测1879人，均为阴性。排查暴露人员的密切接触者4065人，均采取居家医学观察措施。排查从事销售、储运、加工人员10997人并采集咽拭子样本，已全部完成核酸检测，均为阴性。截至6月22日16时，对我市海鲜批发市场外环境和水产海鲜、牛羊肉标本采样7618份，已全部完成核酸检测，均为阴性。
Whether Recovered Covid-19 Patients Are Immune
Medical researchers say the China coronavirus may be present in patients displaying no outward signs of illness A new study conducted by Chinese experts found Covid-19 antibodies may start to diminish within two or three months in most asymptomatic and symptomatic patients after they are initially infected, raising doubts over whether antibodies could serve as “immunity passports” for people who have recovered from the illness. The study published by Nature Medicine on June 18, performed by a team from Chongqing Medical University, also found that asymptomatic people had a weaker immune response to Covid-19 infections than those who had symptoms.
The researchers compared the immune responses of 37 asymptomatic individuals and 37 symptomatic patients and found 40% of the asymptomatic group gave a negative result in a test of blood serum for immunoglobulin G antibodies eight weeks after being discharged from the hospital, while the number for symptomatic group only stood at 12.9%.
Residents of central Beijing get nucleic acid tests for Covid-19 on Sunday. The authors said in the paper, “Together, these data might indicate the risks of using COVID-19 ‘immunity passports’ and support the prolongation of public health interventions, including social distancing, hygiene, isolation of high-risk groups and widespread testing.” No consensus has been made on how long and to what extent antibodies can protect people. The World Health Organization released a scientific briefing in April warning that “there is currently no evidence that people who have recovered from COVID-19 and have antibodies are protected from a second infection.” 新冠患者康复后，抗体很快就消失！有人已感染第二次！ 中国研究人员日前在英国《自然•医学》杂志上发表的一项研究显示，他们在重庆市进行的调查发现，新冠病毒感染者痊愈后体内抗体水平会迅速下降。此外，无症状感染者的免疫反应弱于有症状感染者。 报道称，大多数病毒感染者表现出相对轻微的感染症状，而一小部分人根本没有任何症状。 报道称，人们对这一人群知之甚少，因为他们接受检测的可能性远低于那些随后出现严重症状——包括呼吸系统问题——的人。 中国的研究人员对重庆万州区两组新冠肺炎病人进行了比较：37人表现出症状，37人没有。 研究人员对两组患者在康复数周后采集的血样进行了分析，结果发现，只有62.2%的无症状人群有短期抗体，而有症状患者有短期抗体的比例为78.4%。 报道称，经过八周的康复治疗，81.1%的无症状患者抗体水平下降，而有症状患者抗体水平下降的比例为62.2%。 此外，研究人员还发现，无症状患者比有症状患者的18种亲抗炎细胞信号蛋白质含量更低，表明他们对这种新型冠状病毒的免疫反应较弱。 发表在《自然•医学》杂志上的这项研究的作者说，他们的发现让人们对每个得过新冠病毒的人都能抵抗今后感染这一观点产生了怀疑。 他们写道：“这些数据可能表明了使用新冠肺炎‘免疫护照’的风险，并支持延长公共卫生干预措施，包括保持社交距离、讲究卫生、隔离高危人群和广泛检测。” 英国免疫学会发言人、帝国理工学院免疫学教授丹尼•奥尔特曼说，这项研究对抗击新冠肺炎提出了一个至关重要的问题。 他说：“迄今为止，免疫学的许多数据都来自对住院危重病人进行的分析，但大多数受影响较轻的人都想知道，这是否可能会带来持久的保护性免疫。” 奥尔特曼说，在研究中，许多患者在短短两个月内抗体水平就显著下降，这是“一个重要且可能令人担忧的问题”。 并未参与研究的奥尔特曼说：“尽管这个样本规模很小，但这与一些人的担忧是一致的，即新冠病毒的自然免疫力可能相当短暂。”
China Completes Its Global Satellite Navigation System
The last satellite of the BeiDou Navigation Satellite System blasts off from the Xichang Satellite Launch Center in southwest China's Sichuan Province at 9:43am on Tuesday China launched the last satellite of the BeiDou Navigation Satellite System on Tuesday, marking the completion of the deployment of its own global navigation system.
A carrier rocket carrying the last satellite of the BeiDou Navigation Satellite System blasts off from the Xichang Satellite Launch Center in southwest China's Sichuan Province on June 23 The satellite, the 55th in the family of BeiDou that means "Big Dipper" in Chinese, was launched at 9:43am (Beijing Time) and sent into the preset orbit by a Long March-3B carrier rocket from the Xichang Satellite Launch Center in southwest China's Sichuan Province. The satellite, designated to enter the geostationary earth orbit (GEO), was the last one of the BDS-3 system, which started to offer countries and regions along the Belt and Road as well as the world basic navigation service in December 2018. BDS is one of four global navigation satellite systems in the world. The other three global navigation systems are GPS of the United States, Galileo of the European Union, and GLONASS of Russia.