The changing seasons are favorable conditions for pathogenic microorganisms to develop and attack infants and young children who do not have strong resistance. A common lower respiratory tract infection in children that can progress to severe pneumonia is bronchiolitis. In the video below, Dr. Nguyen Thai Ngoc Chau, Pediatrician, Vinmec Phu Quoc International General Hospital, will share the culprits that cause bronchiolitis in children, so that there are effective ways to prevent it.