Well, this is worrisome. Hospitals need to use encryption across their networks and to use digital signatures to prevent this kind of thing from happening.
Everyone knows about HIPAA's privacy rules, but no one thinks about the data from their CT scan being compromised. Genome sequencing data would be even easier to manipulate. Flip a few characters and your mutations/variants could tell a whole other story. Of course, there should be a special place in hell for people who would do something like that.
Here's a video of how it works from the Cyber Security Labs @ Ben Gurion University for the curious (or paranoid) out there:https://www.youtube.com/watch?v=_mkRAArj-x0
Thanks, radnyc, for posting this!