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Related Concept Videos

Immunological Memory01:23

Immunological Memory

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Immunological memory, a pivotal pillar of the adaptive immune system, is responsible for the body's ability to remember and respond more swiftly and effectively to previously encountered pathogens. This remarkable feature is what makes vaccines so effective in preventing diseases.
What is Immunological Memory?
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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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Pulmonary Tuberculosis II

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Tuberculosis, or TB, is a bacterial infectious disease caused by Mycobacterium tuberculosis. While its primary impact is on the lungs, leading to pulmonary tuberculosis, it can also affect various other organs, a condition referred to as extrapulmonary tuberculosis.
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Infection01:20

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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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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...
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Persistent SARS-CoV-2 infection: significance and implications.

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Persistent SARS-CoV-2 infections are an unrecognized public health issue, potentially affecting many, especially the immunocompromised. Further research into diagnosis, treatment, and viral evolution is crucial.

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Area of Science:

  • Virology
  • Immunology
  • Public Health

Background:

  • Persistent SARS-CoV-2 infection is a significant clinical and public health concern.
  • This condition often goes unrecognized, potentially impacting a substantial number of individuals, particularly the immunocompromised.
  • Tissue reservoirs, including in non-respiratory sites, may drive persistent infection and necessitate novel diagnostic and therapeutic approaches.

Purpose of the Study:

  • To highlight the urgent need for further investigation into persistent SARS-CoV-2 infections.
  • To underscore the potential for persistent replication to generate new, immune-evasive virus variants.
  • To emphasize the importance of defining optimal diagnostic and treatment strategies and monitoring viral evolution.

Main Methods:

  • This study is a review and analysis of the current understanding of persistent SARS-CoV-2 infections.
  • It synthesizes information on the clinical presentation, pathophysiology, and public health implications.
  • The focus is on identifying knowledge gaps and research priorities.

Main Results:

  • Persistent SARS-CoV-2 infection can remain undiagnosed, affecting immunocompromised individuals significantly.
  • The formation of viral tissue reservoirs is a key factor in the persistence of the infection.
  • Persistent replication poses a risk for the emergence of novel SARS-CoV-2 variants that can evade existing immunity.

Conclusions:

  • Urgent prioritization of research into persistent SARS-CoV-2 infections is necessary.
  • Developing effective diagnostic and treatment strategies for persistent infections is critical.
  • Monitoring viral evolution in persistent infections is essential for public health preparedness.