"It worked as expected, sir. Now we have only to watch and wait for any unfortunate side effects." The now young scientist proudly proclaimed.
"That is excellent news I am most excited to see the results myself in person." The old man wheezed from his bed, "How soon will I be able to see her?"
"Just as soon as this takes effect." The scientist muttered as he injected the IV with clear fluid, "This dose is only a quarter strength of our subjects as she regressed farther than anticipated but should hold out long enough to determine the extent of the transformations without repeat injections."
"What side effects are you expecting?" The less withered man asked.
"Given the unexplored nature of the virus its possible for a number of outcomes. The least likely we can already write off with her survival and lack of continued regression. Of the remainder she is most likely to age the same as anyone else until a repeat vaccination is given; 80% of my research points to this outcome."
"And the other twenty?"
"There is a 15% chance of decelerated ageing that would give her an even further lifespan without additional vaccinations; a 4% chance of retaining her current youth indefinitely; and a 1% chance of her body ageing to adulthood and regressing back to the beginning of puberty once again without additional vaccines."
"Hmm the final options are most intriguing. Could we perhaps force such scenarios to be true?" The middle aged man said sitting up in the bed.
"With enough time there is a near guarantee." The scientist answered with drawing the IV from his employers arm.
"Ha! Time is of now consequence now that we have an inoculation against age itself!" The man pulled on his robe and walked for the first time in years. "Come and show me....