1 code implementation • 30 Oct 2023 • Thomas Williams, James M. McCaw, James Osborne
The role of direct cell-to-cell spread in viral infections - where virions spread between host and susceptible cells without needing to be secreted into the extracellular environment - has come to be understood as essential to the dynamics of medically significant viruses like hepatitis C and influenza.
no code implementations • 1 Sep 2023 • Md Nurul Anwar, Lauren Smith, Angela Devine, Somya Mehra, Camelia R. Walker, Elizabeth Ivory, Eamon Conway, Ivo Mueller, James M. McCaw, Jennifer A. Flegg, Roslyn I. Hickson
In this article, we provide a scoping review of mathematical models that capture P. vivax transmission dynamics published between January 1988 and May 2023 to provide a comprehensive summary of the mathematical models and techniques used to model P. vivax dynamics.
no code implementations • 25 Jun 2023 • Somya Mehra, James M. McCaw, Peter G. Taylor
Superinfection, which is driven by temporally proximate mosquito inoculation and/or hypnozoite activation events, is an important feature of P. vivax.
no code implementations • 24 Feb 2023 • Md Nurul Anwar, Roslyn I. Hickson, Somya Mehra, David J. Price, James M. McCaw, Mark B. Flegg, Jennifer A. Flegg
Treatment with a radical cure to target the hypnozoite reservoir is a potential tool to control or eliminate \textit{P. vivax}.
no code implementations • 22 Aug 2022 • Somya Mehra, Peter G. Taylor, James M. McCaw, Jennifer A. Flegg
To model transmission-blocking and antidisease immunity, we allow for geometric decay in the respective probabilities of successful human-to-mosquito transmission and symptomatic blood-stage infection as a function of this immunity level.
no code implementations • 4 May 2022 • Camelia R. Walker, Roslyn I. Hickson, Edmond Chang, Pengby Ngor, Siv Sovannaroth, Julie A. Simpson, David J. Price, James M. McCaw, Ric N. Price, Jennifer A. Flegg, Angela Devine
We apply this model to assess the implications of different treatment coverage of radical cure for mixed and P. vivax infections and a so-called "unified radical cure" treatment strategy for P. falciparum, P. vivax and mixed infections.
no code implementations • 2 Jul 2021 • Somya Mehra, Eva Stadler, David Khoury, James M. McCaw, Jennifer A. Flegg
By constructing an open network of infinite server queues, we derive analytic expressions for several quantities of epidemiological significance, including the size of the hypnozoite reservoir; the relative contribution of relapses to the infection burden; the distribution of multiple infections; the cumulative number of recurrences over time, and the time to first recurrence following drug treatment.
no code implementations • 24 Jun 2021 • Somya Mehra, James M. McCaw, Mark B. Flegg, Peter G. Taylor, Jennifer A. Flegg
We then extend our analysis to consider activation-clearance dynamics for a single mosquito bite, which can simultaneously establish multiple hypnozoites, under the assumption of independent hypnozoite behaviour.