Image File (Img0001)
This appears to be a chart or table displaying in vitro reduction factors for different production steps and viruses. The viruses listed include PRV, SBV, HIV-1, REO3, PPV, and HAV. The reduction factors are measured in log;o. It is not clear what the abbreviations in the table refer to, but it seems to be related to the effectiveness of techniques such as precipitation and pasteurization in reducing viral contamination.*