1. Researchers at Vanderbilt University, led by John T. Wilson, have developed lipid nanoparticles that stimulate the immune system to fight cancer in mice. 2. These nanoparticles transport a nucleic acid molecule that activates the RIG-I pathway, commonly used to detect foreign viruses and aid immune response. 3. The technology shows promise in mouse models of breast cancer and melanoma, with potential for future clinical testing in humans.