I would agree that this is not a reason to send the primary schools back next week. And that waiting to see how other countries get on and for more research to be done is a prudent course of action.
However, I be cautious about picking holes in the story and trying to rubbish what the experts are saying. We are relying on the bbc quoting small section of presumably longer statements. And some of the meaning may have got lost in translation (I’m assuming the Swiss or German statements were not originally in English!)