How infection affects vital signs?

Infection can significantly alter vital signs as the body responds to the invading pathogens. Commonly, fever results from the immune response, leading to an elevated body temperature. Heart rate often increases (tachycardia) as the body works harder to circulate blood and immune cells, while respiration may also become faster (tachypnea) to meet heightened oxygen demands. Blood pressure can fluctuate, sometimes dropping in severe cases of sepsis, indicating a critical condition that requires immediate attention.