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The provided text appears to be a table showing the in vitro reduction factors for various production steps in the context of enveloped and non-enveloped viruses. The reduction factors are represented by logarithmic values. The table includes data for different viruses such as HIV-1, PRV, SBV, MEV, and PPV. The production steps mentioned are cold ethanol fractionation, S/D treatment, and pH4 treatment. The values in the table depict the reduction factor achieved for each virus during these production steps. The table suggests that there are significant reduction factors observed for some viruses during these steps, indicating potential effectiveness in reducing viral load. Overall, the table provides insights into the in vitro reduction of different viruses during specific production steps.*