Advancing Access to Diagnostic Innovation Essential for UHC and AMR Prevention

Inclusion Criteria: * Patients presenting with fever with no focus/RTI: * Children (6 months to \<12 years) and adolescents (12 years to less than 18 years old) of both sexes . * Presenting with an acute febrile illness defined as temperature of \>37.5°C or history of fever within the last 7 days with no focus or suspected RTI. * Parent/guardian providing written informed consent for their children if less than 18 years of age. * Obtain assent for adolescent between 12 and less than 18 years old * Willing to provide blood and other samples and adhere to study procedures explained in the consent forms following the protocol. * Available and willing to return for follow-up visit at the health facility on day 7 (+/- 2 days). Exclusion Criteria: * o Children and adolescents from 6 months to less than 18 years old presenting with chronic febrile illness (fever lasting more than 7 days). * Patients with acute febrile illness outside the allowed age range for the site. * Severely ill patients requiring hospital admission or referral as assessed by the study clinicians. * Anyone refusing consent to the study or not able to attend the health centre for follow-up (adults, the children of parents/guardians, or adolescents who refuse or are missed when asking for consent).