Bronchiolitis: Sanofi's preventive treatment is effective, according to a study. Beyfortus is part of a salvo of treatments aimed at limiting RSV infections.

Several countries, including the United States and France, chose to quickly launch immunization campaigns using BeyFortus, prompting some criticism of an early decision in relation to the available data. Avoid “between 70% and 84%” of hospitalizations, say the researchers in a study published in Eurosurveillance.