Live attenuated vaccination protects aged chimeric ACE2 mice from severe SARS-CoV-2 pathogenicity in vivo. - Russ A; Viherlehto V; Brey S; Wittmann S; Irrgang P; Leicht N; Cordsmeier A; Ensser A; Rieker RJ; Geppert C; Sticht H; Tenbusch M; et al. (PLoS pathogens, 2026)