Until recently it was thought that the Antonine Plague could possibly have been a measles epidemic. However, recent scientific data have eliminated this possibility. See Y. Furuse, A. Suzuki and H. Oshitani, “Origin of the Measles Virus: Divergence from Rinderpest Virus Between the 11th and 12th Centuries,” Virology 7 (2010), pp. 52–55.