Clinical Research Directory

Inclusion Criteria: 1. Voluntary signing of the informed consent form. 2. Common respiratory infections: traditional methods cannot clearly identify and the patient's condition is prolonged without improvement; Patients with a high suspicion of viral pneumonia: such as acute onset during a season of high viral incidence, normal or low blood leukocyte counts, rapid disease progression, negative results for respiratory viral multiplex PCR testing and cultures; Immunocompromised patients: experiencing respiratory infections or severe illness. 3. Sufficient samples can be obtained. 4. Patients with complete clinical data. Exclusion Criteria: 1. Refusal to sign informed consent. 2. Testing has clearly excluded infection. 3. Received antibiotic treatment within three days prior to testing without stopping the medication for more than 12 hours. 4. Sample quality is not up to standard. 5. Unable to obtain sufficient sample. 6. No complete drug usage history.