Workers shut down an entire shopping center in the city where a case had been detected. No deaths have been ascribed to the outbreak driven by the omicron BA.2 variant, which is much more infectious but also less lethal than the previous delta strain.Ī separate outbreak continues to rage in the northeastern province of Jilin and the capital Beijing also saw an additional nine cases, just one of them asymptomatic. Shanghai recorded another 13,354 cases on Monday - the vast majority of them asymptomatic - bringing the city's total to more than 73,000 since the latest wave of infections began last month. Shanghai has reported more than 73,000 positive COVID-19 infections since the resurgence of the highly contagious Omicron variant in March. "Before that, citizens are asked to continue following the current lockdown measures and stay in their homes except for medical and other emergency situations," Gu said. Officials would reevaluate preventative measures after the results of tests on all city residents are analyzed, Gu said. Most of eastern Shanghai, which was supposed to reopen last Friday, remained locked down along with the western half of the city. "The situation is extremely grim," Gu said.Ĭhina has sent more than 10,000 health workers from around the country to aid the city, including 2,000 from the military, and is mass testing residents, some of whom have been locked down for weeks. China has sent more than 10,000 health workers from across the country to Shanghai, including 2,000 military medical staff.īEIJING - The COVID-19 outbreak in China's largest metropolis of Shanghai remains "extremely grim" amid an ongoing lockdown confining around 26 million people to their homes, a city official said Tuesday.ĭirector of Shanghai's working group on epidemic control, Gu Honghui, was quoted by state media as saying that the outbreak in the city was "still running at a high level." Combined with the advanced mathematical model, air quality changes due to future emission control and/or event-driven scenarios are expected to be better predicted.Residents wearing face masks walk by a masked security watch over a barricaded Galaxy Soho commercial office building locked down for health monitoring following a COVID-19 case detected in the area Tuesday in Beijing. This study demonstrates the value of continuous air pollutant monitoring at a roadside on a long-term basis. In contrast, the impact of the lockdown on vehicular emissions cannot be represented well by simply comparing the concentration before and during the lockdown for conventional campaigns. The reduction in NO x and EC attributable to the lockdown was found to be smaller than it appeared because the first week of the lockdown overlapped with the Lunar New Year holiday, whereas, at a later stage of the lockdown, the reduction (50 %-70 %) attributable to the lockdown was more significant, consistent with the satellite monitoring of NO 2 showing reduced traffic on a regional scale. The long-term dataset was used to train the machine learning model, rebuilding NO x and EC in a business-as-usual (BAU) scenario for 2020. In this study, NO x and EC were continuously monitored at a sampling site near a highway in western Shanghai for 5 years (2016-2020). However, our understanding of the trend in vehicular emissions and, in particular, in response to the strict Covid-19 lockdown is limited partly due to the lack of a long-term observation dataset and application of advanced mathematical models. Shanghai, home to approximately 25 million in the Yangtze River Delta (YRD) region in eastern China, has one of the most intensive traffic activity levels in the world. Exposure to elemental carbon (EC) and NO x is a public health issue that has been gaining increasing interest, with high exposure levels generally observed in traffic environments, e.g., roadsides.
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