allergen in a sentence

Dust and pollen are common allergens which can cause symptoms ranging from a runny nose and itchy eyes to serious difficulty in breathing.

Many holiday snacks and treats contain common allergens such as nuts.

Their products are environmentally friendly and not harmful and hypo-allergenic.

New recommendation: Introduce peanut butter and other potential allergens at 4 to 6 months.

allergens such as pollen or pet dander usually affects both eyes, and is seasonal/situational.