Scientists design a nanoparticle that may improve mRNA cancer vaccines: Tests in mice with melanoma and colon cancer show the tiny particle creates an 'army' of immune cells that carry vaccine's instructions, say the researchers

Scientists say they have developed a nanoparticle -- an extremely tiny biodegradable container -- that has the potential to improve the delivery of messenger ribonucleic acid (mRNA)-based vaccines for infectious diseases such as COVID-19, and vaccines for treating non-infectious diseases including cancer.