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 (c54) is assigned to the assessed level of consciousness , and wherein the early warning score is further derived from said criticality value (c54) 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 (cp60), 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 (c54) is assigned to the assessed level of consciousness , and wherein the early warning score is further derived from said criticality value (c54) 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 (cp60), and wherein the early warning score is derived based on the preliminary warning score and the level of consciousness . <EOS>