Rarely, animal corona-viruses can evolve and then spread among people, such as Middle East respiratory syndrome and severe acute respiratory syndrome (SARS).
少数情况下,动物冠状病毒会进化并在人群中传播,如中东呼吸综合征和严重急性呼吸综合征(SARS)。
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These pathogens can include viruses, bacteria and fungi. And humans are not the only ones at risk: all manner of other animal and plant species could be affected.