Personal experience of mine and within circle of my acquaintances. Most of the times there is some "GDPR form" you have to sing to receive any service. The blood test results leak from time to time as well. We might be living in different Polands though.
So, it’s anecdotal to your circle. Maybe you're just using some shady providers? Because that’s not my experience or the experience of those in my circle. You should be more careful when buying stuff online; this is where these things happen, not in doctors' offices.
Nope, it's the healthcare service providers. What do you mean by "shady" how do I recognize them? The blood test lab where local legit doctor sends blood is shady?
> careful when buying stuff online
I know what I'm doing online. You sound like communication from most of retail banks.
If my experience differs from yours, where you claim that something illegal is happening, it obviously suggests that you might be using some kind of shady services. The only time I've had experiences like the one you’re describing is when I was using online shopping or other non-medical services.
If you are so certain that you are right and that you 'know what you are doing online,' have you reported this incident to law enforcement? It would benefit everybody. Could you also specify which healthcare service providers you believe sold your data? This information could help others avoid using them.
