shelter-in-place orders是什么意思？

In addition to preventive measures such as physical distancing, mask-wearing, hand washing, and shelter-in-place orders, the newly available COVID-19 vaccines provide a powerful tool to mitigate the burgeoning growth of adverse outcomes resulting from COVID-19.

除了保持身体距离、佩戴口罩、洗手和就地防疫等预防措施外，新获得的COVID-19疫苗是缓解COVID-19不良后果迅速增长的有力工具。