The Measles Scare?

There has been much in the news recently about a rapid increase in the numbers of childhood measle cases, especially in London. They were saying on the radio this morning that this was due to the number of parents who were refusing the MMR vaccine for their children.

It is of course true that this might well be a reason however, might it equally be likely that the increased rate of immigration, possibly from countries without a vaccination program, might also be a major contributor.