Walensky warns of a potential fourth wave and a feeling of impending doom.

华伦斯基称，要警惕可能出现的第四波疫情，以及末日即将来临的感觉。

Contact tracing can help prevent this potential wave of infections from becoming a tsunami.

接触者追踪有助于阻止这种潜在的感染波演变成海啸。

I think there's some risks associated with that you've got the potential second wave of the virus.

我认为有一些风险，已经有潜在的第二波病毒。