[Young Scholar]

For some with allergies (a few members of my family), a stay in a room with even a slight smoke smell can be extremely unpleasant.

[traditional1]

"For some with allergies (a few members of my family), a stay in a room with even a slight smoke smell can be extremely unpleasant.

Absolutely true...

[elkfersupper]

For some with allergies (a few members of my family), a stay in a room with even a slight smoke smell can be extremely unpleasant.

An allergic reaction requires protein.

There is no protein in tobacco smoke.

What you are describing is hysteria.

[nimbuscloud]

"For some with allergies (a few members of my family), a stay in a room with even a slight smoke smell can be extremely unpleasant."

For some with allergies, the smell of cleaning products, room deodorizer, fabric softener, or lingering scent of perfume can be extremely unpleasant.