Good info on chlorine allergy and more importantly on what symptoms are not due to an allergy but other factors.

To prevent and help lessen the symptoms of swimmers sinsusitis drink lots of water while going swimming in the summer. If you have an allergic reaction to chlorine make sure to see your doctor.

This article is fine for giving some details about chlorine and how it affects people who come in contact with it while swimming. Other than saying that a Chlorine allergy is rare, it doesn't get into much about a chlorine allergy.

Great article. I had never seen Helium before. Really interesting site.