Dynamics of a Fractional-Order Delayed Model of COVID-19 with Vaccination Efficacy.
Vaccines (Basel)
; 11(4)2023 Mar 29.
Article
in English
| MEDLINE | ID: covidwho-2302549
ABSTRACT
In this study, we provide a fractional-order mathematical model that considers the effect of vaccination on COVID-19 spread dynamics. The model accounts for the latent period of intervention strategies by incorporating a time delay τ. A basic reproduction number, R0, is determined for the model, and prerequisites for endemic equilibrium are discussed. The model's endemic equilibrium point also exhibits local asymptotic stability (under certain conditions), and a Hopf bifurcation condition is established. Different scenarios of vaccination efficacy are simulated. As a result of the vaccination efforts, the number of deaths and those affected have decreased. COVID-19 may not be effectively controlled by vaccination alone. To control infections, several non-pharmacological interventions are necessary. Based on numerical simulations and fitting to real observations, the theoretical results are proven to be effective.
Full text:
Available
Collection:
International databases
Database:
MEDLINE
Type of study:
Experimental Studies
/
Observational study
/
Prognostic study
Topics:
Vaccines
Language:
English
Year:
2023
Document Type:
Article
Affiliation country:
Vaccines11040758
Similar
MEDLINE
...
LILACS
LIS