<div>As the COVID-19 pandemic continues to grow, scientists are focusing on understanding how the host immune system responds to the virus in order to better shape public health responses and develop effective vaccines. A new study published on the preprint server medRxiv in September 2020 reports the T cell memory response to the SARS-CoV-2 spike protein, recombinant nucleocapsid protein, and other pooled peptides derived from convalescent patients.</div>