It turns out that viruses evolve from each other, like everything else. So if you look at the evolutionary tree of viruses, you can find parts of their genome that haven't changed over evolutionary time. You can recognize what may be a new virus by identifying this little piece of their genome that hasn't changed and is represented on the chip.
We have a way of dealing with information that has sort of personal - personally identifying information in it. But there are legitimate secrets - you know, your records with your doctor; that's a legitimate secret. But we deal with whistleblowers that are coming forward that are really sort of well motivated.