The reason that so many organizations are concerned with monitoring pollen and mold levels is that they can fluctuate significantly over
time
. Though seasonal allergens do tend to follow a cyclical pattern, there are a variety of factors that influence the amount of pollen and mold present in the air that we breathe. These can include:
region and climate—as the climate varies across different regions, so too does pollen and mold growth. For example according to the american academy of allergy, asthma & immunology , colder climates may see a drop in pollen and mold production during the winter, while warmer climates can see evidence of these airborne allergens year-round.
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These references are in pubmed. This may not be the complete list of references from this article. Adams k. F. Year to year variation in the fungus spore content of the atmosphere. Acta allergol. 1964;19:11–50. Doi: 10. 1111/j. 1398-9995. 1964. Tb03220. X. Aas k. , backman a. , belin l. , weeke b. Standardization of allergen extracts with appropriate methods. The combined use of skin prick testing and radio-allergosorbent tests. Allergy. 1978 jun;33(3):130–137. Doi: 10. 1111/j. 1398-9995. 1978. Tb01522. X. Agarwal m. K. , jones r. T. , yunginger j. W. Immunochemical and physicochemical characterization of commercial alternaria extracts: a model for standardization of mold allergen extracts.
Itchy eyes, nose and throat watery eyes dry, scaly skin mold allergy symptoms vary from person to person and range from mild to severe. You might have year-round symptoms or symptoms that flare up only during certain times of the year. You might notice symptoms when the weather is damp or when you're in indoor or outdoor spaces that have high concentrations of mold.