The ARIA initiative was developed in collaboration with the World Health Organization to provide evidence-based guidelines for diagnosing and treating allergic rhinitis. The goals of ARIA were to update healthcare professionals' knowledge of rhinitis, highlight its impact on asthma, provide guidance on diagnosis and treatment options, and propose a stepwise management approach. ARIA developed evidence-based guidelines in 1999 and produced additional materials to help improve rhinitis care delivery, particularly in developing countries where rhinitis prevalence is high.