O. Abdellatif, A. et al. 2023. Fighting the Progress of COVID-19 by Enhancing Immunity: A Review of Traditional Sudanese Natural Products Containing Immune-Boosting Elements. Journal for Research in Applied Sciences and Biotechnology. 2, 2 (May 2023), 231–240. DOI:https://doi.org/10.55544/jrasb.2.2.33.