About 14 years ago, when I was a parent of young children, as preparation for a talk at a doctors' meeting about vaccines, I surveyed (rather informally) parents - mostly mothers of course - waiting in the playground of our local primary school.

BBC: 'The natural benefits of vaccines'

And there's been some talk of not having a formal conference committee on Capitol Hill, to just sort of do this informally, probably behind closed doors.

WHITEHOUSE: Press Briefing