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Viral infections and allergies.

Paraskevi Xepapadaki1, Nikolaos G Papadopoulos

  • 1Allergy Department, 2nd Pediatric Clinic, University of Athens, Greece.

Immunobiology
|June 5, 2007
PubMed
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Respiratory viral infections influence allergy symptoms, with severe early infections potentially leading to asthma, while mild infections might offer protection. The relationship is complex and depends on various factors.

Area of Science:

  • Immunology
  • Pediatrics
  • Respiratory Medicine

Background:

  • Respiratory viral infections are linked to infantile wheezing and asthma development.
  • The role of viral infections in allergy and asthma is complex, with potential protective or exacerbating effects.
  • Factors like atopy, exposure timing, and infection severity influence the allergy-infection relationship.

Purpose of the Study:

  • To review recent data on the role of viral infections in allergy and asthma development and progression.
  • To explore the dual role of viral infections in influencing allergic sensitization and respiratory diseases.
  • To discuss the interplay between viral infections, immune responses, and the development of atopy.

Main Methods:

  • Review of recent scientific literature and data.

Related Experiment Videos

  • Analysis of epidemiological and clinical studies on respiratory viruses and allergic diseases.
  • Synthesis of evidence regarding the impact of viral infections on Th1/Th2 immune balance.

    • Main Results:

    • Severe early-life viral infections, like bronchiolitis, may increase the risk of childhood asthma and allergic sensitization.
    • Mild, repeated infections in early life might confer protection against asthma by modulating immune responses.
    • Inconsistent findings exist regarding the protective role of respiratory viruses, highlighting the need for further research.

    Conclusions:

    • Viral infections play a multifaceted role in the development and exacerbation of allergy and asthma.
    • The outcome of viral infections on respiratory health is influenced by a complex interaction of host susceptibility, viral characteristics, and environmental factors.
    • Further research is needed to clarify the precise mechanisms and identify therapeutic targets for managing the allergy-infection nexus.