Tests point to global circulation for months before first case confirmed Like mini time capsules, frozen sewage samples can provide a wealth of information about the health and habits of people living within the catchment areas of wastewater treatment plants. Levels of illicit drug use as well as pharmaceuticals and other chemical compounds are monitored in communities around the world through techniques in the field known as wastewater epidemiology.
BEIJING, July 3 (Xinhua) -- Beijing reported two new confirmed domestically transmitted COVID-19 cases on Thursday, the municipal health commission said Friday. One asymptomatic case and one suspected case were also reported, and three people were discharged from hospital after recovery on Thursday, the commission said in a daily report.
WASHINGTON, July 2 (Xinhua) -- U.S.
PYONGYANG, July 3 (Xinhua) -- Kim Jong Un, top leader of the Democratic People's Republic of Korea (DPRK), guided an enlarged Political Bureau meeting here on Thursday over COVID-19 protection measures, the official Korean Central News Agency reported Friday. "At the meeting, as the first agenda item they reviewed the work of the past six months for preventing the malignant contagious disease and discussed an issue on further consolidating the present anti-epidemic situation by enhancing the state emergency anti-epidemic work," the report said.
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