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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.
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When conducting an experiment, it is crucial to have control to reduce bias and accurately measure the dependent variables. It also marks the results more reliable. Controls are elements in an experiment that have the same characteristics as the treatment groups but are not affected by the independent variable. By sorting these data into control and experimental conditions, the relationship between the dependent and independent variables can be drawn. A randomized experiment always includes a...
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COVID-19: an 'extraterrestrial' disease?

Elisabeth Paul1, Garrett W Brown2, Mélanie Dechamps3

  • 1School of Public Health, Université Libre de Bruxelles, Brussels, Belgium.

International Journal of Infectious Diseases : IJID : Official Publication of the International Society for Infectious Diseases
|July 29, 2021
PubMed
Summary

COVID-19 is a complex zoonotic disease, not an exceptional one. Effective management requires addressing underlying health issues and comorbidities, not just the virus itself, using established public health principles.

Keywords:
COVID-19health policyhealth promotionpublic healthtreatment

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Area of Science:

  • Infectious Diseases
  • Public Health
  • Epidemiology

Background:

  • COVID-19 was initially perceived as an exceptional disease, leading to singular focus on the virus.
  • Control measures overlooked crucial biological and social determinants of severe COVID-19.
  • Current understanding reveals COVID-19 shares characteristics with common respiratory infections, exposing pre-existing health system and population vulnerabilities.

Purpose of the Study:

  • To re-evaluate the classification of COVID-19 from an exceptional disease to a complex zoonotic one.
  • To advocate for a shift in response strategies from solely virus-centric to a holistic public health approach.
  • To emphasize the need for integrated strategies addressing both the virus and underlying population health.

Main Methods:

  • Review and synthesis of existing epidemiological data on COVID-19.
  • Analysis of the impact of biological and social factors on disease severity.
  • Comparative assessment of COVID-19 with other infectious respiratory diseases.

Main Results:

  • SARS-CoV-2 has not introduced novel problems but has exacerbated existing health system and population health issues.
  • COVID-19 exhibits characteristics of complex zoonotic diseases, necessitating established medical and public health management principles.
  • Disease severity is influenced by a heterogeneous mix of population factors beyond viral load.

Conclusions:

  • Simple, singular solutions like vaccines are insufficient for complex diseases like COVID-19.
  • Targeted interventions addressing diverse population risk profiles are essential.
  • A comprehensive strategy must integrate upstream prevention, early treatment, comorbidity management, and health system strengthening.