Science Magazine | AAAS: Science Translational Medicine Follow Ultrahigh-concentration biologic therapeutics enabled by spray drying with a glassy surfactant excipient | Science Translational Medicine A copolymer excipient enables stable, ultrahigh-concentration protein formulations for subcutaneous injection. https://www.science.org/doi/10.1126/scitranslmed.adv6427 science.org