TY - RPRT TI - Variola virus is as old as the earliest historical lines of evidence suggest AU - Forni, D. AU - Molteni, C. AU - Cagliani, R. AU - Clerici, M. S. AU - Sironi, M. PY - 2022 DO - 10.1101/2022.06.28.498054 UR - https://www.biorxiv.org/content/10.1101/2022.06.28.498054v1 ID - 10.1101/2022.06.28.498054 ER -