Моральный вирусолог

 Suddenly, he burst into laughter; he almost wept with relief. He shook his head at the stupid whore, and said, "You can't trick me like that! I thought of babies back in '94! At little Joel's christening - he's my cousin's boy." He grinned and shook his head again, giddy with happiness. "I fixed the problem: I added genes to SVC and SVM, for surface receptors to half a dozen foetal blood proteins; if any of the receptors are activated, the next generation of the virus is pure SVA. It's even safe to breast feed, for about a month, because the foetal proteins take a while to be replaced."

 "For about a month," echoed the woman. Then, "What do you mean, you added genes . . . ?"

 Shawcross was already bolting from the room.

 He ran, aimlessly, until he was breathless and stumbling, then he limped through the streets, clutching his head, ignoring the stares and insults of passers-by. A month wasn't long enough, he'd known that all along, but somehow he'd forgotten just what it was he'd intended to do about it. There'd been too many details, too many complications.

 Already, children would be dying.

 He came to a halt in a deserted side street, behind a row of tawdry nightclubs, and slumped to the ground. He sat against a cold brick wall, shivering and hugging himself. Muffled music reached him, thin and distorted.

 Where had he gone wrong? Hadn't he taken his revelation of God's purpose in creating AIDS to its logical conclusion? Hadn't he devoted his whole life to perfecting a biological machine able to discern good from evil? If something so hideously complex, so painstakingly contrived as his virus, still couldn't do the job . . .

 Waves of blackness moved across his vision.

 What if he'd been wrong, from the start?

 What if none of his work had been God's will, after all?

 Shawcross contemplated this idea with a shell-shocked kind of tranquillity. It was too late to halt the spread of the virus, but he could go to the authorities and arm them with the details that would otherwise take them years to discover. Once they knew about the foetal protein receptors, a protective drug exploiting that knowledge might be possible in a matter of months.

 Such a drug would enable breast feeding, blood transfusions and organ transplants. It would also allow adulterers to copulate, and homosexuals to practise their abominations. It would be utterly morally neutral, the negation of everything he'd lived for. He stared up at the blank sky, with a growing sense of panic. Could he do that? Tear himself down and start again? He had to! Children were dying. Somehow, he had to find the courage.

 Then, it happened. Grace was restored. His faith flooded back like a tide of light, banishing his preposterous doubts. How could he have contemplated surrender, when the real solution was so obvious, so simple?

 He staggered to his feet, then broke into a run again, reciting to himself, over and over, to be sure he'd get it right this time: "ADULTERERS! SODOMITES! MOTHERS BREAST FEEDING INFANTS OVER THE AGE OF FOUR WEEKS! REPENT AND BE SAVED . . ."