Amer FA, Saeed MA, Wagih Shaltout S, Nofal HAE, Nafae RM, Arslan K, Tanoglu A, Nechifor M, Luca C, Al-kadhim ZHA, Mosallem A, Hammad NM (2022) Assessment and outcome of hospitalized patients during delta variant COVID-19 pandemic: A multicenter international study. J Infect Dev Ctries 16:1715–1725. doi: 10.3855/jidc.16696