Huh? If the reporting is accurate, he caught COVID off another person when he went outside the room to pick up food, and spread it to 2 more in the room plus 2 more outside the room via use of the nebuliser. Had he come into HQ with the virus, the same would have happened.
It's both embarrassing and unacceptable that he caught COVID in a quarantine hotel.
However he is in that quarantine hotel due to the potential that he has COVID, and the equipment that he used then spread it to 4 more people. I can understand the argument that it was both not his fault that he caught it off someone else who expelled the virus into the hallway during a swab, and that he may well have had no knowledge that the nebuliser was not allowed in HQ, but the exact story you are linking to expressly states that the spread to other individuals was aided by the nebuliser, so to say its use is irrelevant is too long of a bow to draw for me.