Woman cooking at home. Indoor cooking fires can impact lung health.

Cooking at home. Indoor cooking fires can impact lung health.

Woman cooking at home. Indoor cooking fires can impact lung health.

Woman cooking at home. Indoor cooking fires can impact lung health.

Woman cooking at home. Indoor cooking fires can impact lung health.

Indoor air pollution. Cooking at home in villages outside Faisabad town.

Indoor air pollution. Cooking at home in a village outside Faisabad town.

Asthma patient at the hospital in Osun, Nigera

Testing peak expiratory flow (PEF) response in an asthma patient following an exercise test. In normal and asthmatic patients there is a small degree of bronchodilatation during exercise, but in asthmatic patients this initial bronchodilatation is follo

World Asthma Day, Bishek, Kyrgystan

Peak flow demonstration

Child being treated for asthma, Indonesia