> Patient privacy is a huge concern for us and something we think about all the time. Quite simply, we will never share any of our users' data without explicit consent and we are more than happy to both delete our users' data and destroy their sample if requested.

This should be the default rather than a user-requested option. I would consider auto-deleting user data (ensuring privacy for anyone's data outside some window of time) to be akin to auto-opt-in organ donation: most people don't know or care enough to change the default and will go with whatever is on the form (which is why organ donation is 99ish% of some populations in Europe and drastically lower than that in the United States - we should ignore the moral implications of choosing for people and focus on the outcomes of choosing a 'sane' default action). If you want an iron-clad guarantee sequences will never fall into the hands of bad actors (anyone who has delusions of genocide, for example) deletion/destruction is the way to go; perhaps even two or three passes of bit-by-bit overwrite.

Consider a future where such sequences will allow bad actors to engineer viruses against family units, regions of peoples, and so on.