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"Even in early February -- while the world focused on China -- the virus was not only likely to be spreading in multiple American cities, but also seeding blooms of infection elsewhere in the United States, the researchers found," said a report by The New York Times on Thursday.

"Elderly COVID-19 patients usually have other diseases … resulting in them being more likely to fall into dangerous situations," he said.

"Digitalization is the basis for synergetic development of the biomedical industry. The network links biomedical enterprises, financial institutions, the government, and the whole industrial park," Yang said.

"Emerging industries like high-tech enjoy an increasingly important role in driving Beijing's economic growth in the first half of the year," said Pang Jiangqian, deputy head of Beijing Municipal Bureau of Statistics, at a news conference on Wednesday.

"Disaster notification and prevention is still a long and difficult mission in the foreseeable future," he said.