text: i have severe allergy to polluted air, how to build immunity and reduce my allergy? i develop severe allergy reaction to polluted air, i have runny nose, itchy eyes and flu like symtoms. the best advice i ever got from a great allergist in los angeles was to do nasal washes three times a day.  in health food stores they have little pots that will help.  use a little sea salt with warm water to flush out the nasal canals.  this helps greatly.  plus costs little.  think about  buying a air purifier, not a ozone one though.  many people who have reactions to pollution will also get reactions from the air going through ozone purifiers. (i spent hundreds and then got really sick only to find out that i was allergic to the way the machine changed the air).   look on dr. andrew weils site for some good advice and alternatives.