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- Phase 1: The vaccine is given to a small group of healthy volunteers to evaluate its safety, determine the appropriate dosage, and identify any side effects.
- Phase 2: The vaccine is administered to larger groups, including people who represent the target population (e.g., different age groups), to further assess safety and immune response.
- Phase 3: Thousands of participants receive the vaccine to thoroughly evaluate its effectiveness and monitor adverse events compared to a placebo.
