How to Protect Your DNA Data Before and After Taking an At-Home Test
nytimes.com
nytimes.com
Even if you never take the test, but a relative does, your privacy is compromised.
The best thing you can do is ask your family members not to take it.
Hopefully none of you are crimimals, but it just goes to show:
> Law enforcement famously used crime-scene DNA that was shared with a genealogical research site to track down a suspect in the Golden State killer case, even though he never used a DNA test himself.
In the UK you can walk into a lot of hospitals IT room and just plug stuff in without noticing.
So no, basically nobody will protect your privacy other than yourself(which oftentimes is not possible).
The main difference is that it's a little bit harder for private big tech to get access to your data, so if that is your concern you will have a little bit better protection there.
However it's worth noting that even though German is considered one of the countries with the toughest data protection laws, they're not actually enforced for public institutions and that the current health ministry has been pushing hard to make unanonymized data available to insurance companies.