European Federation of Allergy and Airways Diseases Patients'​ Associations (EFA) | 3,004 followers on LinkedIn. EFA is the voice of over 200 million people living with allergy, asthma and chronic obstructive pulmonary disease (COPD) | The European Federation of Allergy and Airways Diseases Patients’ Associations (EFA) is the voice of 200 million people living with allergy, asthma and chronic obstructive pulmonary disease (COPD) in Europe. We have 45 national associations of allergy, asthma and COPD patients in 26 European countries. Visit our European Allergy and Asthma Youth Parliament website, to advocate on the pressing issues for young patients!