Cold sore virus turned cancer assassin shows promise in tough breast cancer

This study tested whether injecting a modified herpes virus (T-VEC) directly into tumors, alongside standard chemotherapy before surgery, could better eliminate triple negative breast cancer. The virus is designed to infect and destroy cancer cells while leaving healthy cells alone, and may also help the immune system attack the tumor. The trial enrolled 50 women with early-stage triple negative breast cancer to find the safest dose and measure how many had no cancer left at surgery.