Until COVID-19, coronaviruses were largely overlooked by virologists. Yet, their abundance in mammalian species could cause new spillover events into humans.

中文翻译：

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在农场上：农场冠状病毒是新的溢出事件向人类传播的大型储存库。

在 COVID-19 之前，病毒学家在很大程度上忽略了冠状病毒。然而，它们在哺乳动物物种中的丰富性可能会导致新的溢出事件进入人类。