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Which of the following is NOT a barrier to entry?
Influenza
A viral outbreak characterized by its rapid spread, affecting the respiratory tract with symptoms like high fever, intense body aches, and mucus buildup, typically seen in epidemic proportions.
Allergy
An allergy is an immune system response to a foreign substance (allergen) that's not typically harmful to the body.
Nasal Discharge
A fluid flow from the nose, often as a result of colds, allergies, or infections.
Common Cold
A viral infectious disease of the upper respiratory tract characterized by symptoms like sneezing, coughing, sore throat, and runny nose.
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