For example, it is known that viral respiratory tract infections in infancy such as respiratory syncytial virus (RSV) are associated with an increased risk of asthma in later childhood and that paracetamol use for such episodes could have caused confounding in the study. The study has contributed to the debate as to whether it is beneficial to treat fever in children, an issue comprehensively reviewed by Fiona Russell and colleagues in the Bulletin of the World Health Organization.