Babies born by elective cesarean section are more likely to get a serious respiratory infection in the first year of life, a study found. Babies born by C-section had an 11 percent greater chance of being hospitalized for bronchiolitis, researchers at the Telethon Institute for Child Health Research in Perth, Western Australia found. The study, published in the online edition of the journal Archives of Disease in Childhood, is based on birth data and hospitalization records of 212,068 babies over a 10- year period in Western Australia.