Allergies are a very common health problem with 5–50% of the world population (approximately 400 million to 4 billion people) suffering from allergic rhinitis.1
Triggered by an overreaction of the immune system to allergens in the air, allergic rhinitis is an inflammation in the nose.2 If it only occurs seasonally or as a result of tree or grass pollen, it’s called hay fever.
The prevalence of allergic rhinitis depends on factors such as geographic location, population density and age, and is reported to increase with time (climate change is associated with increased seasonal pollen exposures).1
As a result, the prevalence of allergies is expected to increase by more than 50% in the next few decades, particularly in colder climates that were previously spared from higher rates of seasonal pollen allergies.1