The Messiah Code
chorea a year later. This modest ward had seen more than fifty people's lives saved in the last nine years. Plus countless more throughout the world as a result of what was tested here.
    Only six beds were being used at the moment. Five of the patients were asleep but he wasn't surprised to see that Hank Polanski was sitting up talking to the head nurse, Beth Lawrence. Today was a big day for the twenty-three-year-old farmer from North Carolina. The FDA had finally approved their new treatment and this morning Hank Polanski was to be injected with the HIV retrovirus that caused AIDS.
    The patients were mainly treated by the other doctors, simply because of his laboratory commitments. But Tom still couldn't help regarding each and every one of them as his own personal responsibility.
    Nurse Lawrence, a tall prim-looking woman with a surprisingly open smile, was busy fitting an intravenous drip into Hank's arm. When she looked up she greeted Tom warmly. "Good morning, Dr. Carter."
    "Morning, Beth. Morning, Hank. How are you feeling today?"
    Hank turned his pale face to him and gave a defiant grin. "I'm still here, Doc." When he spoke he did so with a breathless wheeze.
    "You ready for the treatment?"
    Hank nodded nervously. He was a volunteer for the experimental gene therapy, but Tom knew he had no choice. Hank had lung cancer and would die without radical treatment. This involved inserting genes into Hank's tumor
    cells, genes that would tell the immune system to kill the tumor. Cancer cells are cells that have rebelled against their strict genetic orders, and are growing out of control. To put down this revolt Tom had to make sure he killed all , or virtually all, of the tumor cells. To do that he needed a vehicle to get the killer genes into the rebel cells without harming the good ones. That was where the HIV retrovirus came in.
    Retroviruses could enter a body cell, incorporating their own genetic instructions into the cell's healthy DNA. Like cruise missiles, retroviruses could be reprogrammed in the laboratory, their harmful code turned off and good genes inserted. By neutering the genes in the HIV retrovirus that attacked the human immune system, and putting in special therapeutic genes, the killer that caused AIDS could be tamed to cure lung cancer. Tom and his team had proved they'd made the retrovirus harmless. It had been successfully loaded with genes to target and kill cancerous lung cells. All that remained was to test the genetically engineered retrovirus in a human.
    "What are the risks again?" asked Hank, trying not to look frightened.
    Tom put his hand on Hank's shoulder and rested it there. As always he was careful to be completely honest.
    "One risk is that the retrovirus goes AWOL and invades a healthy cell, and then inserts the genes into the wrong part of your genetic sequence."
    "What would that do?"
    "It could give the healthy cells cancer too. But the odds of that happening are very, very small."
    "Could I catch AIDS?"
    "No, we've tested the retroviral vehicle--or vector as we call it--over the last three years, and we've proved that it's harmless. That's why the FDA sanctioned it. Frankly, Hank, the only real risk to you is that it might not work." He felt the bony shoulder shrug beneath his hand.
    "So I ain't got zip to lose, then?" asked Hank.
    Tom paused for a second and looked into Hank's eyes. He remembered him first coming here three weeks ago, the once fit outdoorsman already so weak he could barely walk. "I ain't good at being sick," he'd explained then. "So kill me or cure me. But just get me the hell outta here." The man had been willing to try anything as long as he could get out of his bed and the hospital.
    "Let me be completely straight with you, Hank," said Tom. "The chances of this treatment failing are high--perhaps eightyfive percent. But the odds of it making you worse are minimal. And the chances of you surviving without it are zero. So you have a choice. One, you do nothing and

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