Not good but plenty of potential explanations
E.g
I have frequent contact with potential covid patients though less so now with the quicker turnaround of testing (but am still very regularly in the hotzone where others awaiting tests could be). I was only vaccinated yesterday as I had leave when my appointment would have been scheduled.
Many hospitals have locum juniors on the covid wards and they may not have been scheduled.
Delirious, demented (or just frightened) patients are not very good at infection control procedures. In the first wave, I saw several examples of people wandering out of their side room, mask round neck shouting for help.
The reality of PPE is that people are not wearing full Hazmat suits and it's quite possible to be exposed when in close contact even if you are being assiduous. I would be disappointed if I had caught Covid from a patient and the response was vilification.
That's not to say it shouldn't be investgated-its just that not every breach needs a personal (or political) villain