Antigen-presenting cells (APC) are key players in initiating the adaptive immune response. However, much is still unknown about how a specific peptide fragment from the entire protein is chosen to be presented since some sections induce stronger immune responses than others. Understanding this mechanism would be vital information for vaccine development. The goal is to produce effective vaccines to protect individuals that are particularly susceptible to the flu. I chose this topic because it is something that I have gotten to research at UAF. I also think it’s very important to understand this mechanism since COVID-19 is all we hear about and the quest for producing a vaccine is currently underway.