B-cell response module - serum correspondence editor in Comparison of experiment sub-module. In case of a comparison across experiments, the problem is that different titration days can be specified in different experiments. Therefore, the system cannot automatically compare the data. The term Virtual Serum was introduced by Compuvac team to solve this dilemma. In the B-cell response module, a user specifies which results should be compared. In other words, when the comparison is between experimental groups belonging to the same experiment, the charts present results for each of the serum titration separately. When the user compares results of experimental groups from different experiments, the charts are created for each of the Virtual Sera assigned. In the provided example, two experiments with different numbers of serum descriptions taken at different days (see VS1) are compared. This “Virtual Serum” editor allows to match data of the 14’th day of experiment E142-UPMC- EG4 with the 15’th day of experiment E175-KI-EG2.