[coldtea]

>But I also know that I'm way more subject to allergic reactions when not in my bed. No matter how dusty or dirty is my room, it's always worse at someone else's place.

That is because of the different "dust/allergen" load in the different places -- to the one in your room you have adjusted already since ages.

[agumonkey]

'load' I don't know, but quality surely. Animals, materials, climate, cleaning level will probably change what lies around.