Experts warn unvaccinated children at risk as north London outbreak spreads Sign up for our free Health Check email to receive exclusive analysis on the week in health Get our free Health Check email Get our free Health Check email Email * SIGN UP I would like to be emailed about offers, events and updates from The Independent. Read our Privacy notice Children starting school are the “sitting ducks” of the latest measles outbreak, experts have warned, as new research shows dozens of schools