GPs are being urged to take care with the seasonal flu jab after reports some youngsters have been given the wrong one.
The Medical Defence Union (MDU) said it was aware of a handful of cases recently where children were given flu vaccines unsuitable for their age group.
Over the last five years, the MDU has received 108 reports of errors in immunising children using all types of jab, including against meningitis.
Some of the jabs in the seasonal flu vaccine programme are not licensed for children under four.
Last year, the Department of Health published a warning against using some flu vaccines after reports some youngsters suffered febrile convulsions following the jab.