Problem
What are the risk factors (i.e. genetic, environmental and/or behavioral) and social determinants that lead to LOWER RESPIRATORY INFECTIONS? Essentially you are answering the question of why this roblem exists - are they getting LOWER RESPIRATORY INFECTIONS because they have a genetic predisposition or because they're exposed to someone who had it or they're living in crowded circumstance and they're very poor, not so well nourished, and more likely to succumb to this than others?