Abstract: A system and method of monitoring a person to detect the onset of an illness. A monitoring unit collects biometric data and exchanges that data with a remote electronic device. Using the monitoring device, a person is monitored across multiple days. The biometric data collected determines a statistical profile for the collected data. After the statistical profile is calculated, the person can be actively monitored as he/she sleeps. The monitoring occurs during a sample period of sleep. The biometric data collected during the sample period is averaged to obtain a statistical value. The statistical value is compared to the statistical profile of the biometric data. If the sampled biometric data falls outside the statistical profile, a warning is produced on the electronic device.