A research team has investigated a new combination therapy against cancer. This therapy employs systemic administration of the tissue hormone interferon-I combined with local application of Imiquimod. This combination showed promising results in topically accessible tumors like melanoma and breast cancer models: The therapy led to the death of tumor cells at the treated sites and simultaneously activated the adaptive immune system to fight even distant metastases. The results could improve the treatment of superficial tumors such as melanoma and breast cancer.