Howard, a middle-aged man, is suffering from erectile problems. He consults his doctor to learn about the likely causes for his
condition. He tells his doctor that he has been suffering from diabetes and low blood pressure. He also tells his doctor that he is a weight lifter and hence spends two hours each day at the gym. He also tells his doctor that his recent blood test shows a lower level of natural killer (NK) cells. Required:
In this scenario, what would the doctor mention as the most likely cause for Howard's condition?
