People who are susceptible to respiratory problems
People who regularly smoke or inhale cigarette smoke
People with a history of respiratory diseases such as recurrent pneumonia and bronchitis
People whose jobs regularly expose them to toxic chemicals: miners, painters, carpenters, construction workers, workers in metal factories or fossil fuel plants, motorcyclists (habal-habal/tricycle) and workers in the environmental sector
People living in areas with polluted air such as big cities, handicraft communities, recycling villages, areas near industrial parks, thermal power plants, coal mines or minerals