Is there a way to prevent cigarette smoke from passing through walls?

I live in a duplex, and my new neighbors smoke. This wouldn’t be a problem except that I can smell it in all of the rooms that share a wall with their apartment (which is annoying, but also triggers my allergies for some reason). Is there anything I can do from my side to prevent the smell from passing into my apartment? Alternatively, is there something the landlords could put in the walls to keep the smoke on their side?