The gun fired and a pulse of ionized aluminium slammed into the man’s chest. Smoking gobbets of flesh exploded from his back, spattering the wall behind half a second before he himself hit the wall and slid down leaving a bloody trail. Mika swallowed drily, waited. After a moment the man reached out, pushed himself to his feet, and took three paces forwards. The hole in his chest, the size of a fist, still smouldered, but a ball of veined pink flesh was oozing out to fill it and extinguish the embers. The man turned slowly, presenting himself dutifully to all the scanning heads arrayed around the isolation chamber. The hole in his back was rather larger, and one shattered rib protruded. The flesh welling up there bore the appearance of brain tissue.

‘That shot would have destroyed his heart,’ Mika noted.

‘Yes. But the little doctor can grow its own replacement of any major organ destroyed. Right now it will be constructing something a little more efficient than the human heart, while dilating veins and arteries to prevent bleeding and keeping essential parts of the body oxygenated via nanotubes,’ D’nissan explained.

‘Nerve damage?’

‘The mycelium can re-route around most of it.’

‘So this is not really repair but replacement with something different?’

‘Yes, all it does is provide support to whatever remains, and even that is limited.’

‘How far?’

D’nissan nodded at the screen. ‘This is about the maximum damage it can sustain. If the victim was hit three or four times like this, his body would die and his little doctor would die along with it. Remember, that though dispersed, the mycelium is being hit as well.’ He shrugged. ‘It’s like an ordinary human body, without a little doctor mycelium—it can only survive so much.’

‘What about bones?’ Mika asked. With this constant barrage of questions she was trying to distance herself from what she had just seen, and to reacquaint herself with her customary scientific detachment.

‘They’re easy to deal with. It pulls them together and lays down calcium glue within seconds.’ He went on. ‘Essentially, anyone carrying this mycelium would need to take a number of direct substantial hits to be killed. Wounds that before would have resulted in him ending up under an autodoc will now only inconvenience him briefly.’

‘And Jain nodes?’

‘None at all. This technology is clean.’

‘Who will get this “little doctor” treatment first?’

‘Soldiers,’ replied D’nissan bluntly.

Mika gave him a fragile smile then moved away. She had stopped here, on her way to the shuttle that would ferry her over to Dragon, meaning to ask D’nissan his thoughts on augmentation, but after witnessing this test found she could not. The man was doing important work, supplying ECS with what might be a vital advantage should Jain technology once again get loose in the Polity.

‘Test two,’ announced D’nissan.

With some disquiet Mika departed.

Tick tick tick . . .