Hello Micky,
I know what HLH or LHC is. I also know families who can tell you more about it - if that's what you want.
Trust me, if it's really HLH (or LHC) you don't want to use that as a saving cord blood, because it can give your child an other blood disease.
I might missed something -so my apologies when I sound rude - but your second daughter is still with you today?
If I can give you any more help, let me know it.
Warmest wishes, Dore