[其他] Most COVID-19 cases in New York City in March traced to Europe

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As many as 75% of the coronavirus strains circulating in New York City in early March were genetically similar to those in other parts of Europe and North America, according to an analysis released by the US Centers for disease on Thursday. Control and prevention. The findings are important because they are based on samples of the new coronavirus, sars-cov-2, collected from patients in five hospitals in the city who were deliberately selected because they were "high usage" spokesmen for "self identified Chinese.". The results of the CDC analysis are similar to a study published in the journal Science in June, which found that virus samples collected from 84 patients in New York City between March 9 and March 14 can be traced back to cases in Europe and elsewhere in the United States. A similar analysis, also published in June in science, found at least seven different coronaviruses circulating in California, suggesting that the outbreak can come from a variety of sources, including overseas travelers and visitors from other states of the United States, the authors said.