Abstract: This invention relates to a combination of erythropoietin glycoisoforms, wherein such glycoisoforms may include a quantity of sialic acid ranging from 4 to 10 molecules of sialic acid per molecule of erythropoietin. The combination of glycoisoforms can be used for the treatment or prevention of sepsis, and used to prepare a pharmaceutical composition including such combination. The invention also encompasses a cell line producing a combination of erythropoietin glycoisoforms, procedures to obtain the cell line, a procedure to produce such a combination of glycoisoforms, and methods of treatment and prevention of sepsis.