An investigation has found that children who received their first dose of the measles vaccine later in life were less likely to become ill during an outbreak. The study showed that kids who received their first dose aged 12 to 13 months had a 6-times-greater risk of contracting measles than those who were given the jab aged 15 months and older. The news comes days after a separate study found delaying the measles vaccine raises the risk of seizures. Abstract