French drugmaker Sanofi has said it is being investigated over Depakine, an epilepsy drug which caused birth malfunctions and slow neurological development when taken during pregnancy.

The contract is for supply, over about five years, of about one million doses of the 6in1 vaccine, which relates to Diphtheria, Tetanus, acellular Pertussis, Hepatits B, Inactivated Polio Vaccine and Hameophilus Infuenza Type B.