Earlier quoted context omitted.
They have the option of not sending HIV status to any third party.
What is the privacy distinction between a third party with a contractual agreement and an employee with a contractual agreement? Remember that Russian intelligence got a spy hired by Microsoft: https://www.theguardian.com/technology/2010/jul/14/russian-s... Will your interview questions find a foreign spy, or someone who isn't even a spy but is interested in looking at private data for personal amusement?
So that would be the main difference. Virtually all of a company's employees shouldn't have access to user data at all, and those that do would only have access to parts of it.