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Doctors are not medical researchers so they would not be the ones investigating "cures" in the first place. Doctors diagnose and treat illnesses based on research performed by scientists. Diseases are very complicated. Even developing a drug that may just treat an illness can take up to 20 years of testing and most drugs tested never make it to market. Many diseases are caused by multiple problems and sometimes the system is poorly understood so more work needs to be done to understand what causes the disease before we can even begin to treat it.
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