Drug intelligence / Profile preview

clesrovimab-cfor

Development stage
Approved
Lead developer
Merck
Modality
Monoclonal Antibodies → Antibody-Based Therapeutics
Administration
Intramuscular
01

Overview

Clesrovimab-cfor is a fully human monoclonal antibody that targets the prefusion F protein of respiratory syncytial virus (RSV). It binds with high affinity to site IV of the RSV F protein, preventing viral fusion and entry into host cells. This mechanism provides direct protection against RSV infection. Clesrovimab-cfor is highly potent in vitro (approximately 50-fold more than palivizumab) and is equipotent against both RSV-A and RSV-B strains. The drug features YTE substitutions for extended half-life (~44 days), allowing for single-dose administration regardless of infant weight. It achieves high nasal tissue distribution at sites of infection and has demonstrated robust efficacy in reducing medically attended lower respiratory infections (MALRI) and hospitalizations due to RSV in infants during their first season. Clesrovimab-cfor was developed by Merck Sharp & Dohme (Merck) and is marketed under the brand name Enflonsia[1][3][4][5][6][7][8][9].

Brand names
Enflonsia
Other names
Anti RSV F antibody - Merck Sharp & Dohme
02

Targets

RSV F (Respiratory syncytial virus fusion protein)

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