Prevention is the best cure
Considering that prevention from something is better than curing it, so it is advised that you should avoid getting contaminated with smoke particularly where the ventilation is poor.
Eliminate Smoke Allergy triggers
If you are smoke sensitive, then it is good to eliminate all smoke allergy triggers from your house. This can include carpets and furniture, as they often trap smoke particles.
No Smoking message
It may not be decent asking someone not to smoke in your presence. For this reason, it is good to paste a NO SMOKING sticker, poster or board where it is easily visible to all others.
Air Humidifier for Chemical Filtration
Using an air humidifier can also cut down the presence of smoke particles in the air. It is advised to install an air humidifier that is used for chemical filtration, because it does not only purify the air but also traps particles like pet hair and mold spores.