Do not use TETRAXIM: If the child is allergic (hypersensitive) to any of the vaccine components (listed in Description), to glutaraldehyde, neomycin, streptomycin or polymyxin B (used during the manufacturing process and which may be present as traces), or to a pertussis vaccine (acellular or whole cell); If the child had an allergic reaction after an injection of the same vaccine or a vaccine containing the same substances; If the child suffers from evolving encephalopathy (cerebral lesions); If the child suffered from encephalopathy (cerebral lesions) within 7 days of a previous dose of a pertussis vaccine (acellular or whole cell pertussis); If the child has fever or a disease which occurred suddenly (acute disease), in this case it is preferable to postpone the vaccination.