Related Experiment Video
Updated: Aug 25, 2025
03:53
Author Spotlight: Advancements in Multiplex Detection of Respiratory Viruses
Published on: November 10, 2023
1.3K
Covid-19: Early Cases and Disease Spread.
Jacques Reis1,2, Alain Le Faou3, Alain Buguet4
1UDS University of Strasbourg, 67000 Strasbourg, France.
Annals of Global Health
|October 17, 2022
Summary
Investigating the origins of Severe Acute Respiratory Syndrome Coronavirus-2 (SARS-CoV-2) is vital for pandemic prevention. Early circulation may have occurred in Italy and France before widespread global transmission.
Area of Science:
- Virology
- Epidemiology
- Public Health
Background:
- The emergence and global spread of Severe Acute Respiratory Syndrome Coronavirus-2 (SARS-CoV-2) necessitate understanding pandemic origins.
- Retrospective analysis is crucial for identifying early transmission events and potential superspreading incidents.
Purpose of the Study:
- To review tools and findings from retrospective searches for SARS-CoV-2 origins in China, France, Italy, and the USA.
- To examine possible emergence scenarios and early circulation patterns of SARS-CoV-2.
- To inform strategies for preventing future viral pandemics.
Main Methods:
- Review of retrospective search tools, their limitations, and results.
- Examination of epidemiological data from China, France, Italy, and the USA.
- Analysis of potential superspreading events and early regional circulation clues.
Main Results:
- The first cases of atypical pneumonia attributed to SARS-CoV-2 were identified in Wuhan, China.
- Possible superspreading events include the 7th Military World Games in Wuhan and Chinese New Year holidays.
- Evidence suggests early regional circulation of SARS-CoV-2 in Northern Italy (Lombardy) by September/October 2019 and in France by November/December 2019.
Conclusions:
- Understanding the precise origin and early spread of SARS-CoV-2 is critical for future pandemic preparedness.
- Additional retrospective studies are needed to definitively trace the origin of SARS-CoV-2.
- Identifying early transmission dynamics can guide the development of effective control and prevention strategies.
Related Concept Videos
01:18Steps in Outbreak Investigation
171
In the ever-evolving field of public health, statistical analysis serves as a cornerstone for understanding and managing disease outbreaks. By leveraging various statistical tools, health professionals can predict potential outbreaks, analyze ongoing situations, and devise effective responses to mitigate impact. For that to happen, there are a few possible stages of the analysis:
171
01:20Infection
8.6K
When a pathogen enters the body and reproduces, it can cause an infection, damage body cells, and cause illness symptoms that eventually lead to disease. Therefore, its prevention requires breaking the chain of infection.
The chain begins with pathogens: bacteria, viruses, fungi, prions, or parasites such as protozoa helminths. These can be present on the skin as transient or resident flora, or they can be acquired from the environment. Identifying and treating the type of infection and...
The chain begins with pathogens: bacteria, viruses, fungi, prions, or parasites such as protozoa helminths. These can be present on the skin as transient or resident flora, or they can be acquired from the environment. Identifying and treating the type of infection and...
8.6K
01:26Stages of Infection
58.5K
Stages of infection describe what happens to a susceptible host once a pathogen invades the human body. The stages of infection are incubation, prodromal, illness, stage of decline, and convalescence. The incubation stage is the period from exposure to a pathogen until symptoms start. The infected person is unaware of impending illness as the pathogens grow and multiply within the body. The duration may vary depending on the type of infection. The incubation period of measles averages ten to...
58.5K
01:17Transmission-based Precautions I: Contact, Enteric, and Droplets
3.9K
Transmission-based precautions are for patients known to be infected or suspected to be infected or colonized with organisms that pose a significant risk to others. Some transmission-based precautions include contact, enteric, and droplet.
Contact Precautions:
Contact precautions are the measures taken to prevent the transmission of infectious agents, especially epidemiologically important microorganisms such as MRSA or influenza, primarily transmitted through direct or indirect contact with an...
Contact Precautions:
Contact precautions are the measures taken to prevent the transmission of infectious agents, especially epidemiologically important microorganisms such as MRSA or influenza, primarily transmitted through direct or indirect contact with an...
3.9K
01:26Principles of Disease Surveillance
169
Disease surveillance is the systematic collection, analysis, and interpretation of health data essential to the planning, implementation, and evaluation of public health practice. This process integrates data dissemination to entities responsible for preventing and controlling disease, injury, and disability. Surveillance systems provide crucial information for action, helping public health authorities make informed decisions to manage and prevent outbreaks, ensure public safety, optimize...
169
01:26Introduction to Epidemiology
922
Epidemiology, known as the cornerstone of public health, involves studying the distribution and determinants of health-related events in defined populations and applying these insights to control health issues. This is essential for understanding how diseases spread, identifying populations at greater risk, and implementing measures to control or prevent outbreaks. Epidemiology addresses not only infectious diseases but also non-communicable conditions like cancer and cardiovascular disease,...
922