"New Horizons in Vaccines" explores the latest advancements and innovations in vaccine development, addressing emerging infectious diseases, personalized vaccines, and novel delivery systems. With the rapid evolution of technology, research is now focusing on mRNA vaccines, nanoparticle-based formulations, and improved adjuvants that enhance immune response. These cutting-edge approaches aim to provide more effective, long-lasting, and adaptable vaccines, offering hope in the fight against pandemics, antibiotic-resistant bacteria, and various non-infectious diseases such as cancer. As we expand our understanding of immunology, these advancements mark a transformative era in preventive healthcare.