4-Year-Old Saves Newborn Twin Brothers From Lethal One In A Million Disease. Siblings sacrifice to save brother with one-in-a-million disease ... The 2-year-old from Seattle was born with an incredibly rare, potentially ... and he is lucky to have two excellent matches in his brothers. His first transplant failed, so doctors are now preparing Liam for a second ... If left untreated, HLH is fatal. https://www.youtube.com/watch?v=dHl2BO71xpw ►Don't forget to subscribe and share please help us to reach the 10.000 subscriber by clicking on the link http://bit.ly/2lDRLhE Narration by Scott Leffler -- scottleffler.com #facts_world #viral_stories #stories