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Rallybio Announces Proof-of-Concept Achieved for RLYB212, a Novel Monoclonal anti-HPA-1a Antibody to Prevent Fetal and NeoNatal Alloimmune Thrombocytopenia

Rallybio Corporation (Nasdaq: RLYB) today announced that clinical proof-of-concept has been achieved in a Phase 1b study for RLYB212, an anti-HPA-1a monoclonal antibody for the prevention of fetal and neonatal alloimmune thrombocytopenia (FNAIT). Results show that one week after a single subcutaneous dose, RLYB212 was able to rapidly and completely eliminate transfused, HPA-1a positive platelets in HPA-1a negative subjects.

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