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Cells are sometimes infected by more than one virus at once. When two viruses disassemble to expose their genomes for replication in the same cell, similar regions of their genomes can pair together and exchange sequences in a process called recombination. Alternatively, viruses with segmented genomes can swap segments in a process called reassortment.
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Rous Sarcoma virus or RSV was discovered by F. Peyton Rous in the year 1911 as a filterable transmissible agent that could cause tumors in chickens. He won a Nobel Prize for this discovery in 1966. His experiments clearly demonstrated that some cancers could be caused by infectious agents and led to the discovery of many more cancer-causing viruses in animals as well as humans.
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RNA viruses are categorized into positive-strand, negative-strand, or double-stranded groups based on their genomic structure and replication mechanisms. This classification dictates how they exploit host cellular machinery for protein synthesis and replication. Some RNA viruses also utilize reverse transcription as part of their life cycle, further diversifying their replication strategies.Positive-Strand RNA VirusesPositive-strand RNA viruses have genomes that function directly as messenger...
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The Antiviral System of Bacteria and Archaea: CRISPR01:23

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CRISPR stands for Clustered Regularly Interspaced Short Palindromic Repeats is a adaptive immune system found in bacteria and archaea that protects against viral infections. This system enables prokaryotic cells to identify, remember, and neutralize foreign genetic elements, primarily bacteriophages, by storing fragments of the invader’s DNA as a genetic memory.The CRISPR immune response begins during an initial infection. Cas (CRISPR-associated) proteins play a central role in this...
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Subviral Agents01:29

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Subviral agents are infectious entities that resemble viruses but lack one or more viral components, such as a capsid or essential replication machinery. These agents include viroids, prions, and satellites, each possessing distinct structural and functional characteristics that influence their mode of infection and replication.Viroids are the simplest subviral agents, consisting of circular, single-stranded RNA molecules without a protein coat. They exclusively infect plants, relying entirely...
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Single Nucleotide Polymorphisms-SNPs01:05

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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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Related Experiment Video

Updated: Nov 9, 2025

Production of Pseudotyped Particles to Study Highly Pathogenic Coronaviruses in a Biosafety Level 2 Setting
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SARS-CoV-2 and Human Immunodeficiency Virus: Pathogen Pincer Attack.

Nicholas Evans1, Edgar Martinez1, Nicola Petrosillo2

  • 1Texas Tech University Health Sciences Center, Department of Immunology & Molecular Microbiology, Lubbock, TX, USA.

HIV/AIDS (Auckland, N.Z.)
|April 9, 2021
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Summary

This review compares the virology and immune responses of SARS-CoV-2 and Human Immunodeficiency Virus (HIV). It explores how these viruses might cooperate within a host, drawing parallels to military strategies.

Keywords:
ACE-2AIDSCOVID-19HIVSARS-CoV-2remdesivir

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Area of Science:

  • Virology
  • Immunology
  • Infectious Diseases

Background:

  • Global efforts focus on understanding SARS-CoV-2 virology, COVID-19 complications, and vaccine development.
  • SARS-CoV-2 transmission occurs via respiratory droplets, fomites, and aerosols; asymptomatic spread is possible.
  • Increasing SARS-CoV-2 infections raise concerns about co-infections and co-morbidities, including with Human Immunodeficiency Virus (HIV).

Purpose of the Study:

  • To comparatively review the virology of SARS-CoV-2 and HIV, using a military analogy to illustrate their interactions.
  • To examine how these viruses may cooperate to establish and maintain infection within a host.
  • To compare viral targets, cellular receptors, lifecycles, immune surveillance tactics, and cytokine responses.

Main Methods:

  • Comparative review of existing scientific literature on SARS-CoV-2 and HIV.
  • Utilized a military analogy to conceptualize viral interactions and host invasion strategies.
  • Focused on virology, host cell receptors, viral lifecycles, immune evasion, and cytokine profiles.

Main Results:

  • Both SARS-CoV-2 and HIV target host tissues, utilizing specific cellular receptors for entry and replication.
  • Comparison highlights similarities in immune response, including the release of specific cytokines.
  • While HIV is manageable with antiretroviral therapy, SARS-CoV-2 treatments are still under active research.

Conclusions:

  • Understanding the comparative virology and host-pathogen interactions of SARS-CoV-2 and HIV is crucial.
  • The analogy aids in visualizing potential viral cooperation, emphasizing the need for comprehensive treatment strategies.
  • Further research is needed to address co-infections and develop effective treatments for novel viral threats like SARS-CoV-2.