Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2023 Mar 6;15(3):691. doi: 10.3390/v15030691

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© 2023 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

PMC Copyright notice

Trajectory plots of populations for parameters corresponding to the boundary region below the upper branch of the hyperbola. Parameter values are set to sample values of Table 1, with $ψ = 0.7$ and $α = 130$ . Initial conditions are $M_{0} = 400$ , $I_{0} = 200$ , $V_{0} = 10, 000$ , $C_{0} = 10$ and $A_{0} = 2$ . Note the very brief time scale for $C (t)$ quickly converging to 0 (under one day).