"What if the rabbit had got loose?"

Stanley looked out of the window. A light snow was falling. "It would have frozen to death."

"Suppose it had been eaten by another animal. Could a fox have become infected?"

"No. Viruses are adapted to a small number of species, usually one, sometimes two or three. This one does not infect foxes, or any other form of Scottish wildlife, as far as we know. Just humans, macaque monkeys, and certain types of rabbit."

"But Michael could have given the virus to other people."

"By sneezing, yes. This was the possibility that alarmed us most. However, Michael seems not to have seen anyone during the critical period. We have already contacted his colleagues and friends. Nonetheless, we would be grateful if you would use your newspapers and television programs to appeal for anyone who did see him to call us immediately."

"We aren't trying to minimize this," Toni put in hastily. "We are deeply concerned about the incident and, as I've explained, we have already put in stronger security measures. But at the same time we must be careful not to exaggerate." Telling journalists not to exaggerate was a bit like telling lawyers not to be quarrelsome, she thought wryly. "The truth is that the public have not been endangered."

Osborne was not finished. "Suppose Michael Ross had given it to a friend, who had given it to someone else… how many people might have died?"

Toni said quickly, "We can't enter into that kind of wild speculation. The virus did not spread. One person died. That's one too many, but it's no reason to start talking about the Four Horsemen of the Apocalypse." She bit her tongue. That was a stupid phrase to use: someone would probably quote it, out of context, and make it seem as if she had been forecasting doomsday.

Osborne said, "I understand your work is financed by the American army."

"The Department of Defense, yes," Stanley said. "They are naturally interested in ways of combating biological warfare."

"Isn't it true that the Americans have this work done in Scotland because they think it's too dangerous to be done in the United States?"

"On the contrary. A great deal of work of this type goes on in the States, at the Centers for Disease Control in Atlanta, Georgia, and at the U.S. Army Medical Research Institute of Infectious Diseases at Fort Detrick."

"So why was Scotland chosen?"

"Because the drug was invented here at Oxenford Medical."

Toni decided to quit while she was ahead and close the press conference. "I don't want to cut the questioning short, but I know some of you have midday deadlines," she said. "You should all have an information pack, and Cynthia here has extra copies."

"One more question," said Clive Brown of the Record. "What's your reaction to the demonstration outside?"

Toni realized she still had not thought of something more interesting for the cameras.

Stanley said, "They offer a simple answer to a complex ethical question. Like most simple answers, theirs is wrong."

It was the right response, but sounded a little hard-hearted, so Toni added, "And we hope they don't catch cold."

While the audience was laughing at that, Toni stood up to indicate the conference was over. Then she was struck by inspiration. She beckoned to Cynthia Creighton. Turning her back on the audience, she spoke in a low, urgent voice. "Go down to the canteen, quickly," she said. "Get two or three canteen staff to load up trays with cups of hot coffee and tea, and hand them out to the demonstrators outside the gate."

"What a kind thought," said Cynthia.

Toni was not being kind-in fact she was being cynical-but there was no time to explain that. "It must be done in the next couple of minutes," she said. "Go, go!"

Cynthia hurried away.

Toni turned to Stanley and said, "Well done. You handled that perfectly."

He took a red polka-dotted handkerchief from his jacket pocket and discreetly mopped his face. "I hope it's done the trick."

"We'll know when we see the lunchtime news on television. Now you should slip away; otherwise they'll all be trying to corner you for an exclusive interview." He was under pressure, and she wanted to protect him.

"Good thinking. I need to get home, anyway." He lived in a farmhouse on a cliff five miles from the lab. "I'd like to be there to welcome the family."

That disappointed her. She had been looking forward to reviewing the press conference with him. "Okay," she said. "I'll monitor the reaction."

"At least no one asked me the worst question."

"What was that?"

"The survival rate from Madoba-2."

"What does that mean?"

"No matter how deadly the infection, there are usually some individuals who live through it. Survival rate is a measure of how dangerous it is."

"And what is the survival rate for Madoba-2?"

"Zero," said Stanley.

Toni stared at him. She was glad she had not known that before.

Stanley nodded over her shoulder. "Here comes Osborne."

"I'll head him off at the pass." She moved to intercept the reporter, and Stanley left by a side door. "Hello, Carl. I hope you got everything you needed?"

"I think so. I was wondering what Stanley's first success was."

"He was a member of the team that developed acyclovir."

"Which is?"

"The cream you put on when you get cold sores. The brand name is Zovirax. It's an antiviral drug."

"Really? That's interesting."

Toni did not think Carl was genuinely interested. She wondered what he was really after. She said, "May we rely on you to do a judicious piece that reflects the facts and doesn't exaggerate the danger?"

"You mean will I be talking about the Four Horsemen of the Apocalypse?"

She winced. "Foolish of me to give an example of the kind of hyperbole I was trying to discourage."

"Don't worry, I'm not going to quote you."

"Thanks."

"You shouldn't thank me. I'd use it happily, but my audience wouldn't have the slightest idea what it means." He changed tack. "I've hardly seen you since you split up with Frank. How long ago is it now?"

"He left me at Christmas two years ago."

"How have you been?"

"I've had some bad times, if you want to know the truth. But things are picking up. At least, they were until today."

"We should get together and catch up."

She had no desire to spend time with Osborne, but she politely said, "Sure, why not."

He surprised her by following up quickly. "Would you like to have dinner?"

"Dinner?" she said.

"Yes."

"As in, go out on a date with you?"

"Yes, again."

It was the last thing she had expected. "No!" she said. Then she remembered how dangerous this man could be, and tried to soften her rejection. "I'm sorry, Carl, you took me by surprise. I've known you so long that I just don't think of you that way."

"1 might change your thinking." He looked boyishly vulnerable. Give me a chance."

The answer was still no, but she hesitated for a moment. Carl was handsome, charming, well paid, a local celebrity. Most single women pushing forty would jump at the chance. But she was not even mildly attracted to him. Even if she had not given her heart to Stanley, she would not have been tempted to go out with Carl. Why?

It look her only a second to find the answer. Carl had no integrity. A man who would distort the truth for the sake of a sensational story would be equally dishonest in other areas of life. He was not a monster. There were plenty of men like him, and a few women. But Toni could not contemplate becoming intimate with someone so shallow. How could you kiss, and confess secrets, and lose your inhibitions, and open your body, with someone who could not be trusted? The thought was revolting.

"I'm flattered," she lied. "But no."

He was not ready to give up. "The truth is, I always fancied you, even when you were with Frank. You must have sensed that."