/GIOB△L INITIATIVE FOR VIC OBSTRUCTIVE JING DISEASWS Burden of COPD a leading cause of morbidity and mortality worldwide and results in an economic and social burden that is both substantial and increasing. COPD prevalence,morbidity,and mortality vary across countries and across different groups within countries.Burden of COPD • a leading cause of morbidity and mortality worldwide and results in an economic and social burden that is both substantial and increasing. • COPD prevalence, morbidity, and mortality vary across countries and across different groups within countries