What vital sign indicated by Nevaeh demonstrates a potential fever?

A temperature of 101.8 °F (38.7 °C) clearly indicates a potential fever, as a normal body temperature typically ranges from about 97°F (36.1°C) to 99°F (37.2°C). When the temperature exceeds this normal range, it usually signifies an underlying infection or inflammation within the body, prompting the immune response that manifests as a fever. This physiological response is important for fighting off pathogens and signals that the body's regulatory mechanisms are activated.

In contrast, while the other vital signs such as elevated blood pressure, increased pulse, and heightened respiratory rate can indicate various states of physiological stress or impact, they do not specifically confirm a fever. Elevated blood pressure could be related to many factors, including stress or pain, the pulse rate might suggest tachycardia possibly due to anxiety, dehydration, or heart conditions, and an increased respiratory rate may signal respiratory distress or anxiety. However, it is the elevated temperature that distinctly identifies a febrile response.