Heres a few examples:
-washing your hands
-use of protective equipment like, gloves, masks, and eyeglasses.
-coughing in your arm
-sneezing into a tissue
-using sterile instruments and devices.
Can you edit it so I can answer your question please
Answer:
viral
Explanation:
It can not be an allergen since they don't cause infections. Only thing left is viral.
Leukotriene modifiers work by blocking the action of leukotrienes, one cause of the inflammation and nasal congestion associated with allergies. For those with allergies and asthma, leukotriene modifiers help keep bronchial tubes, airways to your lungs, from constricting.