美国在扩大的安全监测中,正在检测可能存在的COVID-19疫苗与死亡之间的联系。 The U.S. is probing possible COVID-19 vaccine links to deaths amid expanded safety monitoring.

美国正在调查一些可能与COVID-19疫苗有关的死亡事件,因为联邦政策的变化扩大了对罕见不利事件的监测。 The U.S. is investigating a number of deaths potentially linked to COVID-19 vaccines, following a shift in federal policy that expands monitoring of rare adverse events. 卫生官员说,该检测是目前为确保疫苗安全所作努力的一部分,尽管尚未确定明确的联系。 Health officials say the probe is part of ongoing efforts to ensure vaccine safety, though no definitive connection has been established. 这项行动是在公众审查增加的情况下进行的,要求提高疫苗监督的透明度。 The move comes amid increased public scrutiny and calls for greater transparency in vaccine oversight.