But an empty hospital bed is a revenue loss, and asthma is Children's hospital's leading source of admissions.

Recently, clinicians at children's Hospital Boston adopted a more systematic approach for managing inner-city children who suffer severe asthma attacks, by introducing a bundle of preventive measures.

Peter Hotez: We’re not in a position at this point to know, when a child comes in with asthma, what the likelihood is that person has asthma because of toxocariasis or another source.