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Is Isobel’s Hepatitis C significant? Could it help lead them to her attempted murderer?

I think everything is significant and could lead them to her attempted murder.

Yes. Hep C is not easily transmitted, so I think it will be significant.

No idea on this one.

It possibly talks more about her background. Has she got it through needle use when taking drugs. Not really sure I see it helping them.

Its significance at this point in time is informational about Isobel's history

I think it points more to Isobel’s background than providing clues to the killer