China reported 45 virus cases in the mainland for July 31, down sharply from 127 cases a day earlier, the health commission said.
Of the new infections, 31 were in the far western region of Xinjiang, according to a statement by the National Health Commission. Eight were in the northeastern province of Liaoning, and the remaining six were imported cases.
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China reported 23 new asymptomatic cases, up from 11 a day earlier.
As of the end of Friday, mainland China had 84,337 cases, the health authority said.