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Related Experiment Videos

[Immunisation against varicella].

Daniel Floret1

  • 1Urgence et Réanimation Pédiatriques, Hôpital Edouard Herriot, Lyon, France. daniel.floret@chu-lyon.fr

Therapie
|September 1, 2005
PubMed
Summary
This summary is machine-generated.

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Two Oka strain-derived varicella vaccines show high seroconversion rates in France. While effective, France advises caution due to concerns about long-term protection and potential disease shifts.

Area of Science:

  • Virology
  • Immunology
  • Public Health

Context:

  • France is introducing two new varicella vaccines based on the Oka strain.
  • Varicella vaccination programs have been implemented in other regions, notably the US since 1995.

Purpose:

  • To evaluate the introduction and initial impact of Oka strain-derived varicella vaccines in France.
  • To assess vaccine efficacy, safety, and address concerns regarding long-term protection and disease epidemiology.

Summary:

  • Both vaccines achieve nearly 100% seroconversion after one dose (children) or two doses (adolescents/adults).
  • US data shows an 85% reduction in varicella incidence following a universal vaccination program.
  • Common adverse events include fever, injection site reactions, and varicella-like rashes.

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Impact:

  • France's current recommendations are cautious due to uncertainties about protection duration.
  • Concerns exist regarding a potential shift of varicella to older age groups.
  • The potential increase in herpes-zoster incidence is also a consideration for vaccine policy.