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What causes low-grade fever in the elderly?

Approximately 20–30% of older adults with serious infections may not exhibit a high-grade fever, which makes recognizing less pronounced signs, such as a low-grade fever, crucial. Understanding **what causes low-grade fever in the elderly** is a critical aspect of effective senior care, as it can be the only sign of an underlying health issue. This guide explores the various causes, from common infections to more complex health conditions.