Inclusion Criteria:  For participants in the main study group  Outpatient or inpatients at the Clinical Universidad de Navarra with a complaint of cough. The patient or his/her legal representative, have given consent to participate in the study.  For participants in the sub-study groups:  Being 18 years or older. Providing consent for the sub-study  Exclusion Criteria:  Inability to accept the privacy policy and terms of use of Hyfe. Lack of access to a Wi-Fi network at the site of residence (for the main study group). Unwillingness to regularly use the cough-surveillance system throughout the monitoring period