This look interesting, it took some digging to get to what the actual treatment is, so it gets your body use to the allergen to build up tolerance. What happen

This look interesting, it took some digging to get to what the actual treatment is, so it gets your body use to the allergen to build up tolerance. What happens when you have multiple pollen allergies, how does it track all of them. Also seems like many pollens will be region specific, different trees, etc.