Wearing FFP2-type facemasks for any length of time produces a concentration of CO2 between the face and the mask that is higher than the normal atmospheric concentration, due to the gas we exhale when breathing. CO2 rebreathing can cause adverse health effects, even in healthy people, such as general malaise, headaches, fatigue, shortness of breath,… Seguir Leyendo Experts design a ‘smart’ FFP2 facemask that sends a mobile alert when CO2 limits are exceeded