10 Symptoms of Whooping Cough You Shouldn't Ignore

4. Low-Grade Fever

A low-grade fever is a common condition that is often overlooked and underestimated. When the infected individual develops a low-grade fever, it means the disease is starting to take its toll. In the context of whooping cough, a low-grade fever often signals that the illness is progressing. Clinically, a low-grade fever is generally defined as an oral temperature between 99°F and 100.3°F, above normal but below the 100.4°F threshold for a true fever. While this may not seem threatening, when it's accompanied by other symptoms, it's a reason to worry.