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Body:In certain scenarios, in vitro dissolution tests can replace in vivo bioequivalence studies. This is particularly true when a drug product, though available in varying strengths, maintains proportional similarity in its active and inactive ingredients. In such cases, the need for in vivo bioequivalence studies for lower strength variants may be waived, provided dissolution tests and in vivo studies on the highest strength yield satisfactory results.Bioequivalence can be indicated through...
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WHO's allocation framework for COVAX: is it fair?

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The COVID-19 Vaccines Global Access Facility (COVAX) initially distributes vaccines equally, then by need. An equal distribution may avert more deaths and reduce disparities despite ethical arguments for prioritizing need from the start.

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Area of Science:

  • Global health
  • Vaccine equity
  • Bioethics

Background:

  • The COVID-19 Vaccines Global Access Facility (COVAX) is a global collaboration for COVID-19 vaccine development and distribution.
  • COVAX utilizes pooled funding to support promising vaccine candidates and distribute successful ones.
  • The World Health Organization (WHO) developed a two-stage allocation mechanism for scarce initial vaccine supplies.

Purpose of the Study:

  • To compare COVAX's allocation mechanism with a needs-based targeted allocation.
  • To explore ethical concerns regarding fairness in vaccine distribution.
  • To determine which distribution strategy maximizes well-being and aligns with equity principles.

Main Methods:

  • Comparative analysis of COVAX's two-stage (equal then needs-based) allocation versus a purely needs-based targeted allocation.
  • Evaluation of distribution models based on maximizing well-being and adhering to principles of equity.
  • Consideration of political realities alongside theoretical moral justifications.

Main Results:

  • A needs-based targeted distribution is theoretically more morally justifiable.
  • COVAX's initial equal distribution stage is questioned by ethicists.
  • Ethical frameworks propose prioritizing the worst-off and minimizing harm from the outset.

Conclusions:

  • While needs-based allocation is theoretically superior for equity, political realities favor COVAX's approach.
  • COVAX's equal distribution strategy is more likely to avert a greater number of deaths in practice.
  • The current COVAX model may be more effective in reducing disparities given real-world constraints.