New color-coded test quickly reveals if medical nanoparticles deliver their payload

Researchers have developed a color-coded test that quickly signals whether newly developed nanoparticles -- ultra small compartments designed to ferry medicines, vaccines and other therapies -- deliver their cargo into target cells. The new testing tool could advance the search for next-generation biological medicines. The technology builds upon nanoparticles currently used against cancer and eye disease, and in vaccines for viruses including SARS-CoV-2, the virus that causes COVID-19.