- Administration of a vaccine not foreseen by the study protocol within 30 days prior to randomisation, or planned administration from randomisation to the end of the study with the exception of inactivated influenza vaccines. The administration of diphtheria, tetanus, pertussis, hepatitis B, poliomyelitis, Haemophilus influenzae type b, pneumococcal, rotavirus and/or MenC vaccines is not allowed at any time during the study period but other vaccines are allowed during the period from one day after study Visit 3 to 31 days before study Visit 4.