Febrile infants refer to children under the age of three months who have a fever. Febrile infants are a common concern for parents and healthcare providers, as fever in this age group can be a sign of a serious infection, such as sepsis or meningitis. Research in this area focuses on identifying the causes of fever in infants, developing guidelines for the evaluation and management of febrile infants, and determining the best approach to diagnosis and treatment. This research is important for improving the care and outcomes of febrile infants and reducing the risk of serious complications.