I share an office with another woman and have done for 5 years. She has documented health problems concerning her lungs and breathing. She's been hospitalised at least once each winter.
This year has been particularly bad but she is still coming into work. She looks ghastly and her breathing is very laboured. She admits to feeling unwell.
I am really, really scared of her collapsing and having to try and deal with that situation on my own. It keeps me awake at night. I have never seen anyone so poorly that hasn't been in a care home or hospital tbh.
Our manager is in the same wing but isn't always there. I could be on my own when something happened to her 
Will HR be able to do anything? I unofficially raised it before and was told she cannot be sent home.