Researchers at UC San Francisco, National Jewish Health and Centro de Neumología Pediátrica in Puerto Rico have been awarded nearly $10 million as part of a 5-year grant from the U.S. National Heart Lung and Blood Institute, part of the National Institutes of Health (NIH), to address the root causes of asthma by studying 4,000 children in Puerto Rico, where asthma prevalence and deaths are among the highest in the world. The team plans to follow the children from birth through early childhood to study how genes and viral infections affect respiratory disease.