According to Wikipedia, Clinical research is a branch of healthcare science that determines the safety and effectiveness (efficacy) of medications, devices, diagnostic products and treatment regimens intended for human use.

These may be used for prevention, treatment, diagnosis or for relieving symptoms of a disease. Clinical research is different from clinical practice. In clinical practice established treatments are used, while in clinical research evidence is collected to establish a treatment.
Clinical Research is so important to our lives because it gives hope to a life-threatening condition. The human body as designed and created by God passes through various chemical changes and reactions, hence the inability to ascertain which sickness is bound to avail itself.

Clinical Research provides a platform for diagnosis, testing and finding solutions to an ailment, which can therefore be prescribed for everyone around the globe for consumption and treatment of same sickness.
This makes us to live healthier lives.
No matter the amount of money one has, when sickness which has no cure comes, the individual enters into a state of hopelessness, since his or her money is now useless.