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An Evolving Regulatory Environment for Rare and Orphan Diseases

Advarra

A rare, or orphan, disease by definition affects a small percentage of the population — fewer than 200,000 people in the U.S. But the numbers add up, and taken together, rare diseases impact an estimated 30 million Americans. Since then, the FDA has significantly changed its approach to rare and orphan diseases.

Disease 52
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Deliberate Dysentery

Codon

Today, refined versions of these human challenge studies have become standard practice in testing vaccines for vector-borne diseases (e.g., yellow fever, malaria, and dengue), evaluating new drugs or treatments, and studying pathogenesis, the process by which a disease develops. Why are challenge trials becoming more popular?

Vaccine 132