Renato T. Stein, MD, MPH, PhD graduated in Medicine in 1979 from Pontifícia Universidade Católica, in Porto Alegre, Brazil where he completed his residency in Pediatrics in 1982. He took over as Assistant Professor at the Department of Pediatrics in 1986, and from 1987 to 1989 was a fellow in the Pediatric Pulmonary Service in Toronto, at The Hospital for Sick Children. In 1994 Dr. Stein took a position as a research fellow in Tucson, Arizona, where he worked with the Children’s Respiratory Study cohort, publishing in the field of risk factors related to asthma in children. In 2011 he did a 6 months sabaticcal in the Center for Environmental Epidemiology, in Barcelona, Spain. In Brazil Dr. Stein has been leading a large and productive group of researchers at his Institution. His main areas of interest are the relation between respiratory viruses and recurrent wheeze, asthma phenotypes, impact of the environment on respiratory health, and respiratory disease of preterm infants.