Disease signals or symptoms do not begin in hospitals; they emerge hidden in daily life. As smartphones increasingly detect disease signals, the device in one’s hand is becoming the first hospital. Diagnosis no longer requires visiting a hospital, waiting for a ticket, and seeing a doctor. Now, the smartphone is the "first hospital."
Smartphones capture these moments. Sometimes, they detect signals that might not appear in hospitals. A respiratory sound analysis app uses the smartphone’s microphone placed against bare skin to determine via artificial intelligence (AI) whether a user has bronchitis, asthma, or pneumonia. The breathing sounds once heard through a stethoscope are now interpreted as AI data. Use smartphones to observe the body and detect disease signals. Record symptoms, track biometric changes as numbers, and share daily disease-detection data with doctors. Hospitals can wait, but disease information should be gathered first. The closer one is to smart healthcare, the more personalized health management evolves.
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