US FDA approves Merck’s Enflonsia (clesrovimab-cfor) for prevention of respiratory syncytial virus lower respiratory tract disease in infants born during or entering their first RSV season

Merck/MSD

9 June 2025 - Enflonsia is the first and only RSV preventive option administered to infants using the same dose regardless of weight

Merck today announced the US FDA has approved Enflonsia (clesrovimab-cfor) for the prevention of respiratory syncytial virus (RSV) lower respiratory tract disease in neonates and infants who are born during or entering their first RSV season.

Read Merck press release

Michael Wonder

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Michael Wonder

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Outcome , Medicine , US , Registration