Stochastic numerical technique for solving HIV infection model of CD4+ T cells Muhammad Umar, Zulqurnain Sabir, Fazli Amin, Juan L. G. Guirao and Muhammad Asif Zahoor Raja Eur. Phys. J. Plus, 135 5 (2020) 403 Published online: 19 May 2020 DOI: 10.1140/epjp/s13360-020-00417-5