by Trinity College Dublin Graphical Abstract. Credit: Cell Reports Medicine (2023). DOI: 10.1016/j.xcrm.2022.100899 Scientists have discovered there is a “Goldilocks” effect in identifying the size of a “vaccine adjuvant” that can trigger strong immune responses and, as an example, have shown that a safe, biodegradable adjuvant can boost the action of cancer-killing cells—if the particles are the...