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回答: 意大利的 COVID-19 测序结果: 洗清武汉首发嫌疑? 由 张旺教授 于 2021-08-09 10:24
Interpretations: We find evidence that SARS-CoV-2 was circulating in
Lombardy during the late summer of 2019. This finding highlights the
importance of retrospective surveillance studies to understand the early
dynamics of COVID-19 spread and improve national-level preparedness.
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