With the virus being spread from person to person contact through respiratory droplets, expert

say the safest course while shopping is to avoid close contact with other shoppers.

随着病毒通过飞沫在人与人之间传播，专家说，购物时最安全的做法是避免与其他购物者密切接触。

请教老师：With the virus being spread...

这里应该理解成with复合结构，还是应该理解成with是介词？ 另外，being spread这里是动名词还是现在分词，如何判断呢？

谢谢老师！