Pollen Across Borders: A Global Allergy Overview

 


1. Japan's Pollen Situation

In Japan, hay fever, known as "kafunshō," affects a significant portion of the population, with approximately 42.5% suffering from some form of hay fever and 38.8% from cedar pollinosis as of 2019. The main culprits are the pollen from Cryptomeria japonica (sugi) and Japanese cypress (hinoki), two native tree species​​.

2. Pollen in Western Countries

In contrast to Japan, Western countries deal with a variety of pollen types due to their diverse flora. Grass, tree, and weed pollens, such as ragweed, are common allergens. In Europe and North America, pollen seasons vary, but they typically include early spring through late autumn, affecting a considerable portion of the population with allergic rhinitis.

3. Pollen Allergies in Southeast Asia, the Middle East, Africa, and South America

While less documented, pollen allergies do exist in these regions. The prevalence and impact of pollen allergies can vary significantly due to different climates and vegetation types. In tropical climates, pollen seasons may be less pronounced, but urbanization and environmental changes are leading to increased allergy awareness.

4. Coping with Pollen Allergies: Global Perspectives on Management and Treatment

Allergen immunotherapy, including subcutaneous and sublingual methods, has shown long-term benefits and is utilized globally. This treatment approach has confirmed long-term clinical efficacy even after discontinuation, offering hope for sustained relief from allergy symptoms​​. Japan, in response to its significant pollen allergy issue, has developed a considerable industry around products and services to help people cope, including protective wear, medication, and even "hay fever relief vacations"​​.



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