Other specified and unspecified upper respiratory diseases can arise from a variety of etiologies, including viral infections, environmental irritants, and allergic reactions. Common viral pathogens include rhinoviruses and coronaviruses, which can lead to symptoms of congestion, cough, and sore throat. Additionally, non-infectious factors such as exposure to tobacco smoke, pollution, or occupational hazards may contribute to the inflammation and dysfunction of the upper respiratory tract. In some cases, underlying chronic conditions, such as asthma or allergic rhinitis, may exacerbate these respiratory symptoms.