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Causality or causation is a fundamental concept in epidemiology, vital for understanding the relationships between various factors and health outcomes. Despite its importance, there's no single, universally accepted definition of causality within the discipline. Drawing from a systematic review, causality in epidemiology encompasses several definitions, including production, necessary and sufficient, sufficient-component, counterfactual, and probabilistic models. Each has its strengths and...
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A single nucleotide polymorphism or SNP is a single nucleotide variation at a specific genomic position in a large population. It is the most prevalent type of sequence variation found in the human genome. Point mutations that occur in more than 1% of the population qualify as SNPs. These are present once every 1000 nucleotides on an average in the human genome. Replacement of a purine with another purine (A/G) or a pyrimidine with another pyrimidine (C/T) is known as a transition. In contrast,...
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SARS-CoV-2: Cross-scale Insights from Ecology and Evolution.

Celine E Snedden1, Sara K Makanani1, Shawn T Schwartz1

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|April 24, 2021
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Ecological and evolutionary principles explain the spread of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Understanding these concepts offers vital insights into emerging viral threats and pandemic dynamics.

Keywords:
COVID-19 pandemiccoronavirusesdisease ecologyemerging infectious diseasesinterdisciplinary sciencezoonotic spillover

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Area of Science:

  • Ecology
  • Evolutionary Biology
  • Virology
  • Epidemiology

Background:

  • Research on coronavirus disease 2019 (COVID-19) has largely focused on virology, clinical aspects, and epidemiology.
  • However, fundamental ecological and evolutionary processes are critical to understanding the pandemic's emergence and spread.

Purpose of the Study:

  • To highlight five key ecological and evolutionary concepts relevant to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2).
  • To demonstrate how these concepts illuminate the emergence and spread of SARS-CoV-2.
  • To showcase the application of ecological and evolutionary perspectives across different biological scales.

Main Methods:

  • Conceptual analysis integrating ecological and evolutionary frameworks.
  • Application of concepts such as invasion, consumer-resource interactions, spatial ecology, diversity, and adaptation.
  • Examination across host-level, population-level, and community-level biological organization.

Main Results:

  • Ecological and evolutionary concepts provide unexpected insights into SARS-CoV-2.
  • These principles apply across various biological scales, from individual hosts to multispecies communities.
  • The study demonstrates the broad applicability of ecological and evolutionary thinking to virology.

Conclusions:

  • Ecological and evolutionary perspectives are essential for a comprehensive understanding of emerging viruses like SARS-CoV-2.
  • Interdisciplinary approaches integrating ecology and evolution offer significant benefits for pandemic research.
  • These insights are crucial for anticipating and managing future viral threats.