Rarely, animal corona-viruses can evolve and then spread among people, such as Middle East respiratory syndrome and severeacute 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）。
2
In content, they owe much to the severeacute respiratory syndrome (SARS) epidemic of 2003.
在内容上，该条例很大程度上起因于2003年的严重急性呼吸系统综合症(SARS)。
3
strengthening disease and nutritional surveillance, particularly for severeacute malnutrition;