I was wondering about Luca too and I’ve just found this on the NHS site about HIV, it mentions that healthcare professionals.
“People with HIV are protected under the Equality Act (2010).
There's no legal obligation to tell your employer you have HIV, unless you have a frontline job in the armed forces or work in a healthcare role where you perform invasive procedures.
If you work in a healthcare role, you'll need to be monitored by your occupational health team and HIV doctor to ensure you're not putting yourself and patients at risk of infection.
The Equality Act 2010 also places restrictions on the health questions employers can ask during a job application process.
Employers are allowed to ask health questions only after an offer of employment has been made to help them decide whether you can carry out tasks essential for the job.
If you're asked a question you think is not allowed under the Equality Act 2010, you can tell the employer or the Equality and Human Rights Commission. The GOV.UK website has more information about questions an employer can ask about health and disability.
If you're an employee with HIV, you may worry that your HIV status will become public knowledge, or you'll be discriminated against if you tell your employer.
On the other hand, if your boss is supportive, telling them may make it easier for adjustments to be made to your workload or for you to have time off.”