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Perhaps an even bigger game changer is CRISPR/Cas9

Stand by for CRISPR/Cas9 [Clustered Regularly Interspaced Short Palindromic Repeats] – i.e. ‘snip & splice’ cutting out of problematic DNA and replacing with repaired sections. Chinese research using non-viable human embryos means this is offering a potential cure for Tay-Sachs, Huntington’s, cystic fibrosis and sickle-cell anaemia amongst others. While this development holds out hope for many people and could result in major benefit, the technique also means that the edited DNA will be part of the germ line and passed on to future generations.  Concern about the potential risks and ethical questions about altering  the human genome has led some to call for a moratorium on all such research. 

http://www.theguardian.com/commentisfree/2015/sep/06/banning-genome-editing-is-not-the-answer