I've had lots of time to sit around pondering things. Are our delicate Western constitutions not adjusting to the local food?
I did see something worrying on Thursday. On the way to the foodcourt in the Olympic media centre, I stopped at the toilet. As I washed my hands a man who looked suspiciously like a chef - he was wearing an apron and a tall white hat - strode past me without stopping at the basin after he had finished his business.
Now maybe he washed up in the kitchen instead. Far be it for me to jump to conclusions. But ... suffice to say I didn't feel hungry any more.
The organisers have placed a big emphasis on hygiene. Each toilet in every venue has a cleaner assigned to it, an army of young people doing a marvellous job keeping the bathrooms and toilets spick and span. And in front of every outlet of the foodhall is a dispenser of antiseptic gel for customers to sanitise their hands before eating.
So I'm hoping the outbreaks we're aware of are isolated cases and not linked to cleanliness. After all, it's a very sensitive subject, hygiene.