A lot of people don't know that Alzheimer's actually has physical symptoms, as well as cognitive symptoms. You lose your sense of balance, you get muscle tremors, and that tends to lead people to being less and less mobile.

It was simply to encourage the inoculation of children by, not only making it a social event I think good use of behavioral economics in that, if you turn up with several other mothers to have your child inoculated, your sense of confidence is much greater than if you turn up alone.