Der bør udvises forsigtighed, når denne vaccine gives til personer med kendt overfølsomhed (ud over anafylaktiske reaktioner) over for det aktive stof, over for et eller flere af hjælpestofferne, thiomersal over for æg, kyllingeproteiner, kanamycin - og neomycinsulfat, formaldehyd og cetyltrimethylammoniumbromid (CTAB).
Caution is needed when administrating this vaccine to persons with a known hypersensitivity (other than anaphylactic reaction) to the active substance, to any of the excipients, to thiomersal and to eggs, chicken proteins, kanamycin and neomycin sulphate, formaldehyde and cetyltrimethylammonium bromide (CTAB).