Scientists Discover a Hidden Immune Backup System That…

Scientists Discover a Hidden Immune Backup System That Could Improve Future mRNA Cancer Vaccines The success of mRNA vaccines during the COVID-19 pandemic changed the way the world thinks about vaccines. Today, the same technology is being explored as a promising approach to treating cancer. Now, researchers at Washington University School of Medicine have uncovered a surprising discovery that could help make future mRNA cancer vaccines even more effective. For years, scientists believed that a specific type of immune cell called cDC1 dendritic cells was essential for mRNA cancer vaccines to activate the body's tumor-fighting T cells. However, a new study published in Nature found something unexpected. Even when these immune cells were absent, experimental mRNA cancer vaccines still generated a strong anti-tumor immune response in mice. Researchers discovered that another immune cell, known as cDC2, was able to step in and perform a similar role: acting as a built-in backup system for the immune response. Unlike traditional vaccines that prevent infections