In epidemiology, contact tracing is the identification and diagnosis of people who may have come into contact with an infected person. For sexually transmitted diseases, this is generally limited to sexual partners. Dr. William Tolbert presently heads his own cosmetic dermatology practice. One day an old friend from medical school calls and needs his help. Little did William Tolbert know this call would change his life. It would take him back to his first love, epidemiology.
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