European Commission approves Merck's ENFLONSIA for RSV prevention in infants

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European Commission Approves Merck’s ENFLONSIA™ (clesrovimab) for the Prevention of Respiratory Syncytial Virus (RSV) Lower Respiratory Tract Disease in Infants During Their First RSV Season

April 17, 2026 7:49 AM EDT

ENFLONSIA is the first and only RSV preventive option in the European Union for administration to infants without the need for weight-based dosing

RAHWAY, N.J.--(BUSINESS WIRE)-- Merck (NYSE: MRK), known as MSD outside of the United States and Canada, announced today that the European Commission (EC) has approved ENFLONSIA (clesrovimab) for the prevention of respiratory syncytial virus (RSV) lower respiratory tract disease in neonates (newborns) and infants during their first RSV season. ENFLONSIA is contraindicated for infants with hypersensitivity to the active substance or any of its... More