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Wheezing and hives are often indicative of an allergic reaction. When an individual has a food allergy, the immune system mistakenly identifies certain proteins in food as harmful and overreacts, leading to a variety of symptoms. Wheezing occurs as a result of constriction and inflammation in the airways, while hives are a skin reaction characterized by raised, itchy welts.

Foodborne illness primarily presents with gastrointestinal symptoms such as vomiting and diarrhea, not respiratory or dermatological reactions like wheezing and hives. Poor hygiene may lead to infections or illnesses, but again, does not typically cause the specific allergic symptoms mentioned. Undercooked food can also result in foodborne illness, rather than triggering an allergic response.

Therefore, food allergies are the most accurate cause of symptoms like wheezing and hives, as they directly relate to the body's immune response to specific foods.