The Roche Group has reported positive data from a Phase 3 programme of the monoclonal antibody crovalimab in people with paroxysmal nocturnal haemoglobinuria (PNH), a rare and life-threatening blood condition. PNH occurs when red blood cells are destroyed by the complement system, part of the innate immune system. Participants in the second of two studies had not been previously treated with complement inhibitors.
