Adult (≥18 years) non-trauma patients with a new onset of infection (prehospital infection group) or considered to belong to the prehospital control group (the next consecutive patient cared for in the same ambulance, immediately following the patient suspected to have a new infection but not him/ herself considered suffering from an infection) will be invited to participate. A Case Report Form (CRF, the same for both prehospital groups), including eight short yes/no-questions representing keywords related to the patients´ medical history will be used for all included patients. In addition, the CRF will prompt ambulance personnel to document the six vital parameters (respiratory rate, oxygen saturation, heart rate, systolic blood pressure, level of consciousness, temperature) in accordance to current guidelines. Level of consciousness is described according to GCS (Glasgow Coma Scale) or AVPU (Alert, Voice responsive, Pain responsive or Unresponsive)-since both scales are currently used in the ambulance.