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"Either children are less likely to become infected, which would have important epidemiologic implications, or their symptoms were so mild that their infection escape detection, which has implications for the size of total community infection," wrote doctors Anthony Fauci, Clifford Land and Robert Redfield.

"Democrats have gained in recent weeks because of a backlash to Trump's nativist appeals," said West.

"Developing a vaccine usually takes more than a decade, so the fact that we were able to condense what usually takes years into months is a major victory," he said.

"During the operation, police spared no efforts to track down the stolen relics," said Liu Xinyun, deputy governor of Shanxi and the provincial police chief.

"Even though I knew the performances would be top-level, they were so much more exciting than I expected," he said. "The atmosphere was terrific, and I have learned a lot."