Which gas exposure symptom includes flu-like signs?

Fume fever from zinc exposure is characterized by flu-like symptoms such as fever, chills, fatigue, and muscle aches. This condition occurs when individuals are exposed to zinc oxide fumes during processes such as welding, particularly when using galvanized metals. The body's immune response to the inhaled zinc particles leads to these flu-like symptoms, which can occur several hours after exposure.

In contrast, carbon monoxide poisoning presents with symptoms like headache, dizziness, and confusion, which do not resemble flu-like signs. Nitrogen oxide exposure can lead to respiratory symptoms such as coughing and shortness of breath, while ozone exposure generally causes pulmonary irritation and symptoms distinct from flu-like illnesses. Thus, the specific association of fume fever with flu-like signs makes this the correct answer.