Clinical trials are research studies that test new ways to prevent, detect, or treat health conditions. This could include a new medicine, vaccine, device, or lifestyle approach. These trials help researchers find out what works, what doesn’t, and whether it’s safe, all to advance medicine and improve health.

Before any treatment becomes available to the public, it goes through phases of testing:

• Phase 1 checks basic safety in a small group
• Phase 2 looks at whether it works and continues safety checks
• Phase 3 compares it with existing treatments in a larger group
• Phase 4 happens after approval to track long-term results

People of various ages and health backgrounds can volunteer, but each trial has specific eligibility criteria (rules about who can join). Some have the condition being studied, while others are healthy. Participation is always voluntary, and you can leave at any time. Every trial follows strict safety and privacy rules that are reviewed by medical and ethics experts.

There are different types of trials:

• Treatment trials test new therapies
• Prevention trials explore ways to avoid illness
• Screening trials find better ways to detect disease
• Quality-of-life trials aim to improve daily life for people with ongoing conditions