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Cancer treatment vaccines are a rapidly evolving field that offers a promising approach to immunotherapy. Unlike traditional vaccines that prevent diseases, cancer treatment vaccines are designed to treat existing cancers by stimulating the immune system to recognize and attack cancer cells.
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Laboratory Techniques Used to Maintain and Differentiate Biotypes of Vibrio cholerae Clinical and Environmental Isolates
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Current and future cholera vaccines.

Hanif Shaikh1, Julia Lynch2, Jerome Kim2

  • 1International Vaccine Institute, Seoul, Republic of Korea; K.E.M. Hospital Research Centre, Pune, Maharashtra, India.

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Summary

Oral Cholera Vaccines (OCV) are effective for adults and older children but need improvement for young children. OCVs are cost-effective public health tools for cholera prevention, especially with mass vaccination campaigns.

Keywords:
CholeraOral cholera vaccineParenteral cholera vaccinePreventionStockpileVaccineWHO prequalification

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Area of Science:

  • Global Health
  • Vaccinology
  • Infectious Disease Epidemiology

Background:

  • Cholera is a significant global health issue, exacerbated by poor water and sanitation infrastructure.
  • Oral Cholera Vaccines (OCV) are recommended alongside WASH interventions in endemic and outbreak-prone regions.
  • Current OCVs provide good protection for adults and older children but limited efficacy in children under five.

Purpose of the Study:

  • To review the current status and future directions of Oral Cholera Vaccines.
  • To highlight the cost-effectiveness and public health impact of OCVs.
  • To identify areas for vaccine improvement, particularly for younger populations and single-dose regimens.

Main Methods:

  • Literature review of OCV efficacy, safety, and implementation strategies.
  • Analysis of factors driving global OCV demand and stockpile utilization.
  • Examination of ongoing research in vaccine development, including single-dose and genetically attenuated vaccines.

Main Results:

  • OCVs are safe for pregnant women and cost-effective due to direct and herd immunity effects.
  • Increased global demand for OCVs is supported by WHO recommendations, mass vaccination feasibility, and Gavi funding.
  • A global OCV stockpile ensures rapid access and equitable distribution in low-income countries.

Conclusions:

  • OCVs are valuable tools for cholera control, with ongoing research focused on improving duration of protection and efficacy in young children.
  • Development of single-dose vaccines and genetically attenuated strains are key future directions.
  • Continued investment in OCVs and supportive global mechanisms like the stockpile are crucial for cholera prevention and outbreak response.