I tested positive for COVID so couldn't go into the office for a meeting. I messaged my manager to let her know. I didn't tell anyone else the specific reason, I just said I was unwell.
A colleague then brought up that I had had COVID. The only way they would have known is if my manager had told him.
I don't really care and it was never a secret. I'm quite new to the company too for context. I guess it's just made me second guess what I can tell my manager.
(Also I hadn't been to the office for 2+ weeks when I tested positive so it's not like my colleagues needed to know they had been in contact with me)