Merck, MAB8599, Anti-RSV Antibody, fusion protein, all type A, B strains, clone 131-2A

RSV is a labile paramyxovirus that produces a characteristic fusion of human cells in tissue culture--the syncytial effect. Two subtypes, A and B, have been identified. Subtype B are characterized as the asymptomatic strains of the virus. The more severe clinical illnesses involve Subtype A strains.