The exposure of Biobank data on GitHub is the latest in a long series of governance challenges for UK Biobank. (My colleague and I have an editorial in the BMJ about this: http://bmj.com/cgi/content/full/bmj.s660?ijkey=dEot4dJZGZGXe...). The latest is today, with information of all half a million members listed for sale on Alibaba.
Looking at the takedown notices, we often see specific files being targeted rather than entire repositories (possibly to justify the copyright infringement as required for a takedown notice, not a copyright expert; although it is clear that they only use DMCA notices as a last resort, for GitHub users they cannot identify, and who were likely not given access in the first place). A quarter of the files are genetic/genomics. Tabular data account for another large share and could contain phenotype or health records.