I'm currently in a hospital waiting room. I've deliberately sat by the window and opened it for ventilation. A person in uniform leaned over me to shut the window, just told me they were shutting it and quickly walked away by the time I looked up so I couldn't ask why.
I spoke to another uniformed person and they said I'd be ok because I'm wearing a mask.
I then spoke to the nurse treating me and she said I was fine to open it again!
AIBU to insist on ventilation?