Which symptom is NOT commonly associated with an infection?

Chilliness is not commonly associated with an infection in the same way that the other symptoms are. Swelling, redness, and pus are all signs of inflammation and infection. When the body detects an infection, the immune response causes increased blood flow to the affected area, leading to redness and swelling. Pus, which consists of dead white blood cells, bacteria, and tissue debris, is also a classic indicator of an infection, particularly in abscesses or when the body is trying to fight off an infective process.

Chilliness, while it might occur during systemic infections due to fever or as a response to changes in body temperature regulation, is not a direct symptom of localized infection. Chilliness can be more associated with conditions like hypothermia or other illnesses that do not directly relate to the body's response to infection, making it a less reliable indicator in that specific context.