What are you talking about?
Hewo, Yes, actually you can, although we cannot see the germs on the cart, there are alot of germs on a cart, especially sickness germs, Germs spread quickly although we cannot see them, germs are small things all over us, on every single thing or living thing there are millions of germs, most of which carry diseases, Hope this helps! or helped! have a nice day ^W^
The public health protects and improve the health of communities through helping them prevent having disease or acquire illness throughout their communities and they do it through research and having it promoted by educating them in order to help them prevent and have a healthy community.