Environmental Factors
Climate changes may affect the development of this condition. Persons living in cold or dry areas are more likely than those in other climates to be diagnosed with this condition. Seasonal changes like between the spring and fall may cause an increase in the diagnosis of eosinophilic asthma. This effect may be due to high levels of pollen and other allergens in the air, and people spend a lot of time outdoors rather than in their respective homes. [7] However, there have been several cases where patients suffering from this condition do not have reactions to any of the allergens, including pollen, smoke, or pet dander. Hence, environmental factors aren’t always a determinant for eosinophilic asthma.
Reference:
[1] https://www.mayoclinic.org/symptoms/eosinophilia/basics/causes/sym-20050752
[2] https://www.who.int/genomics/about/Asthma.pdf
[3] https://www.medicalnewstoday.com/articles/319466
[4] https://apfed.org/about-ead/eosinophilic-asthma/#:~:text=Eosinophilic%20asthma%20is%20most%20commonly,older%20adults%20and%20pediatric%20patients.
[5] https://erj.ersjournals.com/content/40/Suppl_56/P2334
[6]https://pubmed.ncbi.nlm.nih.gov/15356546/#:~:text=No%20interaction%20between%20gender%20and,persistence%20and%20severity%20of%20asthma.
[7] https://apfed.org/about-ead/eosinophilic-asthma/#:~:text=like%20eosinophilic%20asthma.-,Causes,dander)%20that%20trigger%20asthma%20symptoms.