Abstract: The invention relates to purified vaccine preparations and methods for providing them. Provided is a method for providing purified viral particles of SFV. comprising the steps of i) providing a preparation of SFV replicon particles: ii) subjecting said preparation to an endonuclease treatment under conditions allowing for degradation of exogenous/host cell DNA and RNA: iii) bringing said endonuclease-treated preparation with a zwitterionic buffer solution to a conductivity of up to about 5.5 mS/cm: iv) contacting the preparation obtained in step (iii) with a strong anion exchange resin: v) eluting the bound SFV replicon particles from said anion exchange resin: vi) bringing the eluted SFV particles to a conductivity in the range of 7.0 to 9.