Letters have been sent to the parents of all Derbyshire school pupils children, reminding them to make sure their children get the MMR vaccine.
Derbyshire County Council has written to all parents in primary and secondary schools as part of its work, in partnership with Public Health England and the NHS, to keep the number of measles cases in Derbyshire low.
There have been just four reported cases of measles in the county this year, but public health professionals are urging parents to check their child's vaccination status, following a national outbreak.
2013 is expected to be the worst year for measles in the UK for the past two decades. Read more about the illness and how it is treated.
15 cases of measles have been recorded in the East Midlands in the first three months of this year.