In groups of mice (n=10) monitored for several months to study the long-term effect of vaccination on established tumours, only three of 10 mice (30%) in the group treated with the Neuro-IL2/IL12 vaccine and one of 10 mice (10%) in the group treated with the AJ-IL2/IL12 vaccine developed tumours (Figure 2). Here, IL2 is linked to neoplasm.