Because her blood type was too special, lab mice wouldn't work.
In every experiment, progress is made through repeated failures.
It's like solving a problem—only after getting it wrong and carefully reviewing your steps do you learn where the issue lies and how to improve.
Annabelle Linton now understood what Simon had meant by 'It's not that there's no solution, we're just out of options,' and his comment that the 'initial prototype' had been ready for a while.
'Just as Mia Holloway had said, with so much time having passed, it was impossible for them to have made zero progress on any experiment. So, the initial prototype must have been ready for a long time.'
'But there was nowhere to test it.'
'In the past, they always tested experiments on lab mice. But this virus was specifically created to target her blood type, so mice couldn't be used as test subjects.'
'Which meant the only possible test subject... was her.'
