Can infection be passed via router?

I have N.Internet Security on my computer connect by line to a router and a Win. 8.1 tablet connected wirelessly to the router and protected only by Windows.

 

I need to go to a site which might  be a potential source of some kind of infection and to protect my computer want to go there from my tablet.

 

Please help me understand - if some infection enters my tablet will my computer still be safely protected or the infection can get there also?

 

Many thanks for attention