Effect of Respiratory Virus Infection on EmeRgencY Admission Study (EVERY Study)

The investigators register consecutive patients who meet the eligibility criteria at 3 participating hospitals from electronic medical records. As a routine clinical practice, presence of respiratory symptoms using standard electronic medical record (EMR) format are universally assessed at the emergency room when the patients are determined to be admitted. Patients are registered if they meet the eligibility criteria and information of medical history, baseline characteristics, living status, physical findings, laboratory tests, chest X-ray, electrocardiogram, on admission are retrieved from the EMRs. The nasopharyngeal swab is obtained within 24 hours after admission as a standard practice, which will be sampled at either emergency rooms or hospital wards. The swab is transferred to the onsite laboratory office to measure the FilmArray 2.1 by trained technicians or physicians in charge.

Serum antibodies for RS virus are obtained from patients with suspected lower respiratory infection (bronchitis and pneumonia) who provided their written informed consent, at the timing of admission and 4 weeks after the admission.