Study on air particles and asthma/allergies

I am doing a study on air particles and how it affects people with asthma and allergies. I am mainly doing a study on the ammount if air particles in indoor. I need some questions answered though. Here are some questions that i need answered. Thanks to all that reply.
1. What ammount of air particles is needed (in a room, or if its both the same outside and inside) for Asthma to act up? A measure would be a preferred answer.
2. The same as above, but air particles needed for Allergies to act up.
I am guessing that it doesnt really on the ammount, but i am curious.
3. What room is most likely to have the most air particles? bathroom, shower room, bedroom, kitchen, garage, living room, family room, or closet
Please include any other information that may help my study. Thank you again for all those who answer.
-Ivan Khau :smile: