She was fine – it was about 18 months ago. Threw up in toilets, taken home by friends, spent next day in hospital on a drip. Too late to test, but staff were pretty convinced by symptoms, and there was a suspicious timing of her partner (who would otherwise have been there) being away. She was off work for a couple of days, and did spread the story around the office, albeit as "a stranger must have got my drink when no-one was looking, we must all be very careful". She had already been planning to leave for other reasons, but this hardly encouraged her to change her mind, and I think there were a couple of non-immediate colleagues that she wondered about as possible suspects.