Related Experiment Video
Updated: Oct 8, 2025

Live Imaging and Quantification of Viral Infection in K18 hACE2 Transgenic Mice Using Reporter-Expressing Recombinant SARS-CoV-2
Published on: November 5, 2021
SARS-CoV-2 emerging complexity and global dynamics
Francesca Bertacchini1, Pietro S Pantano2, Eleonora Bilotta2
1Department of Mechanical, Energy and Management Engineering, University of Calabria, Cubo 43, 5th floor, Ponte P. Bucci, 87036 Arcavacata di Rende, Cosenza, Italy.
Abstract:
The novel SARS-CoV-2 virus, prone to variation when interacting with spatially extended ecosystems and within hosts, can be considered a complex dynamic system. Therefore, it behaves creating several space-time manifestations of its dynamics. However, these physical manifestations in nature have not yet been fully disclosed or understood. Here we show 4D and 2D space-time patterns of the rate of infected individuals on a global scale, giving quantitative measures of transitions between different dynamical behaviors. By slicing the spatiotemporal patterns, we found manifestations of the virus behavior, such as cluster formation and bifurcation. Furthermore, by analyzing morphogenesis processes by entropy, we have been able to detect the virus phase transitions, typical of adaptive biological systems. Our results for the first time describe the virus patterning behavior processes all over the world, giving them quantitative measures. We know that the outcomes of this work are still partial and more advanced analyses of the virus behavior in nature are necessary. However, we think that the set of methods implemented can provide significant advantages to better analyze the viral behavior in the approach of system biology, thus expanding knowledge and improving pandemic problem solving.
Related Concept Videos
Single Nucleotide Polymorphisms-SNPs
Causality in Epidemiology
Principles of Disease Surveillance
Global Regulatory Systems
Rous Sarcoma Virus (RSV) and Cancer
RSV is a retrovirus that contains two copies of a plus-strand RNA genome. Its genome consists of four main open...
Viral Mutations

