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As part of their project, particular concern is being paid to diseases like congenital heart conditions, cerebral palsy, hepatic echinococcosis, osteoarthritis and rheumatism that have a relatively high incidence rate in the region, which has an average altitude of more than 3,000 meters, as well as diseases like AIDS.

As part of its broader efforts to boost security, Didi said a “zero tolerance policy” will be implemented to ensure a proper driver-vehicle match for all of Didi’s services. The company will ask every driver on Didi’s platform to pass a facial recognition test every day when they start service.

As internet-based services hog the lion's share of people's internet usage, firms that offer them are vying for user attention, experts said.

As of Monday afternoon US Eastern Time, New York state reported 138,863 COVID-19 cases, topping the country's 50 states. Over 79,000 cases were recorded in New York City, according to data compiled by Johns Hopkins University.

As of 8 a.m. Thursday, more than 9.94 million people had been sampled, while over 7.64 million of the collected samples had been tested. Except for the cases already reported, no new positive samples have been detected.