1. An emulsion comprising an external continuous phase of the first liquid and an inner discontinuous phase of the second fluid, which is at least partially miscible with the first liquid wherein the emulsion further comprises: (a) a biodegradable surface active block copolymer comprising one or more hydrophilic units and one or more hydrophobic blocks (B) a biodegradable encapsulating polymer, and (c) a biologically active agent.2. Emulsion according to claim 1, wherein the inner discontinuous phase or outer continuous phase comprises at least 0.001 mg / l of the surfactant block sopolimera.3. Emulsion according to claim 1, wherein the inner discontinuous phase or outer continuous phase comprises at least 0.1 mg / l of the surfactant block sopolimera.4. Emulsion according to claim 1, wherein the inner discontinuous phase or outer continuous phase comprises from 0.1 mg / l to 10 mg / l surfactant block sopolimera.5. Emulsion according to claim 1, characterized in that a biodegradable surface active block copolymer is neionnym.6. Emulsion according to claim 1, characterized in that the surface-active block copolymer comprising one or more blocks of hydrophilic poly (ethylene glycol) (PEG), poly (vinylpyrrolidone) (PVP) or a polysaccharide and one or more hydrophobic block of poly (lactide), poly (glycolide), poly (caprolactone), poly (valerolactone), poly (hydroxybutyrate) or sopolimer.7. Emulsion according to claim 1, characterized in that one or more blocks of hydrophilic surface-active block copolymer has a molecular weight of from 250 to 20,000 Daltons (Da) .8. Emulsion according to claim 1, characterized in that one or more blocks of hydrophilic surfactants1. Эмульсия, содержащая внешнюю непрерывную фазу первой жидкости и внутреннюю дисперсную фазу второй жидкости, которая по меньшей мере частично не смешивается с первой жидкостью где эмульсия дополнительно содержит: (а) биоразлагаемый поверхностно-активный блок-сополимер, содержащий один или более гидрофильных
