[Sherman Logan]

And according to the tv ads, it goes thru keyholes and power outlets into the nieghbors bedroom where the baby is inhaling the smoke. How real is that ?

Quite real. Of course, the quantity that gets through is highly different on the size and location of penetrations between the spaces and on the pressure differential between them.

[Sherman Logan]

different - dependent.

Sorry bout that.

This is actually my field.

For exposure you need:
A source. Cigarette smoking.
A pathway. In this case penetrations between the air spaces.
A driving force. In this case a higher air pressure in the source room would be needed for significant contaminant movement.
A person to be exposed. In this case, the baby.