A wearable system, comprising an ear-worn device, wherein the ear-worn device comprises a number of sensors, each of which is configured to generate a respective sensor signal when the wearable system is worn by a user of the wearable system, each sensor signal being representative of at least one vital function activity of said user, wherein the wearable system is configured to - derive from said sensor signal or signals at least three biomedical quantities of the user out of the following: a heart rate, an oxygen saturation of the blood, a blood pressure and a respiratory rate, wherein to each of the at least three biometric quantities, a criticality value (c44, c46, c48, c50) is assigned, and - derive an early warning score from the biomedical quantities and from said criticality values (c44, c46, c48, c50), wherein a level of consciousness of the user is assessed as a further biometric quantity, and a respective criticality value is assigned to the assessed level of consciousness, and wherein the early warning score is further derived from said criticality value corresponding to the level of consciousness. wherein a preliminary warning score is derived from criticality values (c44, c46, c48, c50, c52) corresponding to at least some biometric quantities other than the level of consciousness, wherein the level of consciousness is assessed when the preliminary warning score exceeds a critical preliminary value, and wherein the early warning score is derived based on the preliminary warning score and the level of consciousness. wherein the ear-worn device comprises a number of sensors, each of which is configured to generate a respective sensor signal when the wearable system is worn by a user of the wearable system, each sensor signal being representative of at least one vital function activity of said user, wherein the wearable system is configured to - derive from said sensor signal or signals at least three biomedical quantities of the user out of the following: a heart rate, an oxygen saturation of the blood, a blood pressure and a respiratory rate, wherein to each of the at least three biometric quantities, a criticality value (c44, c46, c48, c50) is assigned, and - derive an early warning score from the biomedical quantities and from said criticality values (c44, c46, c48, c50), - derive from said sensor signal or signals at least three biomedical quantities of the user out of the following: a heart rate, an oxygen saturation of the blood, a blood pressure and a respiratory rate, wherein to each of the at least three biometric quantities, a criticality value (c44, c46, c48, c50) is assigned, and - derive an early warning score from the biomedical quantities and from said criticality values (c44, c46, c48, c50), wherein a level of consciousness of the user is assessed as a further biometric quantity, and a respective criticality value is assigned to the assessed level of consciousness, and wherein the early warning score is further derived from said criticality value corresponding to the level of consciousness. wherein a preliminary warning score is derived from criticality values (c44, c46, c48, c50, c52) corresponding to at least some biometric quantities other than the level of consciousness, wherein the level of consciousness is assessed when the preliminary warning score exceeds a critical preliminary value, and wherein the early warning score is derived based on the preliminary warning score and the level of consciousness.