Longitudinal analysis reveals that delayed bystander CD8+ T cell activation and early immune pathology distinguish severe COVID-19 from mild disease di Bergamaschi, L, Mescia, F, Turner, L, Hanson, AL, Kotagiri, P, Dunmore, BJ, Ruffieux, H, De Sa, A, Huhn, O, Morgan, MD, Gerber, PP, Wills, MR, Baker, S, Calero-Nieto, FJ, Doffinger, R, Dougan, G, Elmer, A, Goodfellow, IG, Gupta, RK, Hosmillo, M, Hunter, K, Kingston, N, Lehner, PJ, Matheson, NJ, Nicholson, JK, Petrunkina, AM, Richardson, S, Saunders, C, Thaventhiran, JED, Toonen, EJM, Weekes, MP, Göttgens, B, Toshner, M, Hess, C, Bradley, JR, Lyons, PA, Smith, KGC