Mathematical epidemiology has a long history of origin and development. In particular,
mathematical modeling and analysis of infectious diseases has become a fundamental and …

Opioid misuse continues to cause significant harm. To investigate current research, we
conducted a sco** literature review of disease spread models of opioid misuse from …

The aim of the present study is to consider a heroin epidemic model with age-structure only
in the active heroin users. The model was formulated with the help of available literature on …

We consider an age structured heroin epidemic model, in a population divided into three
sub-populations: S the susceptible individuals, U 1 the drug users and U 2 the drug users …

To study the consumption of heroin in a heterogeneous environment, we propose and
analyze a spatiotemporal model with a distributed delay. Using the spectral theory, we …

In this paper, we have modified the White and Comiskey heroin epidemic model (White and
Comiskey in Math. Biosci. 208: 312–324, 2007) into a nonautonomous heroin epidemic …

Substance abuse remains a global problem, with immense health and social consequences.
Crystal meth, known as 'tik'in South Africa, is a growing problem, and its supply chains have …

Motivated by the global impact of heroin addiction and the challenges associated with
relapse rates among users, this paper investigates a stochastic non-autonomous distributed …

By using the direct Lyapunov method and constructing appropriate Lyapunov functional, the
global stability for the heroin epidemic model with distributed delay is investigated. It is …

Intravenous substance consumption is on the upswing all over the globe, especially in
Europe and Asia. It is extremely harmful to society; excessive substance consumption is the …