Originally Posted by navylad

Given no health consequences, legal proceedings don't seam a good course of action- it was unpleasant but hasn't as far as we know affected anyones health (many posters appear to be over-estimating the biohazard risk here which is low - although not zero). Alternative routes have been ruled out by OP. Taking the avoid has been ruled out by the OP as they feel that this would indicate satisfaction with the outcome from BA. OP has a further flight booked with BA but has stated an intent not to fly with the airline again. Seams a logical course of action to me given the reasoning presented.

Sadly, this won't be the first case of vomit on a plane, I'm sure it won't be the last. They are mostly caused by air-travel sickness (unlikely in a hospital where infective cause is more likely) so the risk is lower than a vomit situation elsewhere, but should still be treated with appropriate care.