A. Taqaddas,  Role and Relative Effectiveness of Immune System for Combating Small Pox and AIDS.   journal   = {International Journal of Medical and Health Sciences}, [online]. World Academy of Science, Engineering and Technology.
    August 2014, vol. 92(8). 516 - 521
    [viewed 11 May 2024]. Available from: https://publications.waset.org/pdf/9999323.