During this period, there were 301 visits to the ED, 40% of which occurred during the fall (September–November) ( Fig. 1 A ). [ncbi.nlm.nih.gov]

Spring, summer, and fall are great times to spend outside, whether it’s to enjoy the budding trees and flowers, lush grass, or changing leaves. [venta-usa.com]

In late fall there was a second rise, lasting with fluctuations throughout winter, with a trough in summer. [pediatrics.aappublications.org]

By The fall and winter months are filled with some of our favorite holidays, but Michigan’s cold weather can cause problems for people with asthma. [henryfordlivewell.com]

Thus far no emphasis has been placed on the fact that these symptoms frequently assume a seasonal character and become confused with pollen hay fever and asthma. [jamanetwork.com]

A comparison of immunotherapy schedules for injection treatment of ragweed pollen hay fever. J Allergy Clin Immunol 69 :181–193, 1982. [ PubMed ] [ Google Scholar ] 20. Halonen M, Stern DA, Wright AL, et al. [ncbi.nlm.nih.gov]

Sinusitis, also called a sinus infection, is an inflammation or swelling of the sinuses due to infection. When the sinuses become blocked and filled with fluid, bacteria grow, causing infection and inflammation. [webmd.com]

In several studies of asthma exacerbations induced by rhinovirus, the risk for an attack increases substantially if patients with asthma are also allergic. 1, 2, 16, 17 These studies indicate that allergic inflammation, including high titers of allergen [ncbi.nlm.nih.gov]

Thus far no emphasis has been placed on the fact that these symptoms frequently assume a seasonal character and become confused with pollen hay fever and asthma. [jamanetwork.com]

Frequency of airborne Alternaria spores in Tucson, Arizona over a 20 year period. Ann Allergy 46 :30–33, 1981. [ PubMed ] [ Google Scholar ] 22. Rabito FA, Iqbal S, Holt E, et al. [ncbi.nlm.nih.gov]