if you have seen rats near your home. maybe you need to clean your garden/home more often.
if rats are already in a supermarket then the supermarket has been too relaxed with health and safely precautions for a long time.. hanta should not be the only concern
+1 to this, unsure on why we'd freak out about Hantavirus when we have a large amount of control, and information regarding it. This isn't like the Coronavirus where there are many many MANY unknowns, this is a virus that we have a good amount of data and research on.
Here's the info from the CDC regarding the Hantavirus -
https://www.cdc.gov/hantavirus/index.html - Outbreaks in 2017 and 2012 in the US.
We'll be alright, just staying sanitary will help here. Pretty much helps in all walks of life.