Vaccine trials

Vaccine trials are structured studies designed to test the safety and effectiveness of vaccines in humans. They typically occur in phases: Phase 1 focuses on safety and dosage in a small group of healthy volunteers. Phase 2 expands the group to assess immune responses and further evaluate safety. Phase 3 involves thousands of participants to compare the vaccine's effectiveness against a placebo. If successful, data is submitted to regulators for approval. These trials ensure that vaccines are safe and effective before being distributed to the general public, ultimately aiming to protect against diseases and control outbreaks.