IL2 and breast cancer: On days 14 to 28 after first immunization, the IL-2 content of the MLP-2H, MLP-2M and APS groups was significantly higher than that of the MLP-2L, VC and BC groups (p< 0.05), though there was no significant difference among the MLP-2H, MLP-2M and APS groups (p> 0.05).