SONNINO, Giorgio, PEETERS, Philippe, AND NARDONE, Pasquale. " Modelling the Spread of SARS-CoV2 and its variants. Comparison with Real Data. Relations that have to be Satisfied to Achieve the Total Regression of the SARS-CoV2 Infection." Medical Research Archives [Online], Volume 10 Number 7 (31 July 2022)