Joseph Malinzi (University of Eswatini) is visiting the department from 29th January to 26th February, and will be giving a seminar on Friday 14th February at 11am in the Access Grid Room. We will go to lunch afterwards. Title: Investigating the synergistic anti-cancer effects of combining two oncolytic viruses: the case of vaccinia and vesicular stomatitis Abstract: This research investigates the synergistic effects of combining Vaccinia (VV) and Vesicular stomatitis (VSV) oncolytic viruses for cancer treatment. The mathematical model is based on an experiment by Le Boeuf et al., where the combination of VV and VSV demonstrated synergistic oncolytic activity in vitro and in vivo. The model’s solution long-term behavior has been analyzed, allowing us to predict the outcome of the combination, a global sensitivity analysis has been conducted to determine the parameters that most significantly influence the treatment outcome and several numerical simulations have been carried out to investigate the effect of different factors. Optimal time delays (\tau1 and \tau2 representing optimal virus initial delivery of VV and VSV), to minimize tumor cell count during virus administration, have been determined. Joint work with Raluca Eftimie, Anotida Madzvamuse, Rachid Ouifki, Amina Eladdadi and Helen Byrne