The University of Oxford (Figure S14) has been carried out in many directions, including M. tuberculosis antigen 85a, candidate vaccine MVA85A, LTBI (latent TB infection), factors affecting prognosis, epidemiology of infectious diseases, co-infection of COVID-19, secondary molecules, proteins, and cytokines in vaccine development, rope coefficient, recombinant BCG vaccine, and influenza virus 17D, CD8+ T cells in the respiratory system. Here, CD8A is linked to COVID-19.