It keeps nasal passages clear. Onions are a very good addition to the diet. They have anti-inflammatory properties. In an emergency, you can put onion under your tongue if you're having a severe asthma attack. Yogurt introduces friendly bacteria into your system.
Raw honey is wonderful.
It's full of pollen and causes a natural desensitization. Buy it from beekeepers in your area because it will contain pollens in your area. It's similar to allergy shots, but it's much easier on your body. Cure is a big word. It's a different way of treating the body.