Vaccinen må ikke gives til personer, der har haft en anafylaktisk reaktion (svær overfølsomhedsreaktion) over for en af vaccinens komponenter eller over for et af de sporstoffer, den indeholder (meget lavt), f. eks. æg, kyllingeprotein, ovalbumin (et protein i æggehvide), formaldehyd, gentamicinsulfat (et antibiotikum) og natriumdeoxycholat.
The vaccine should not be given to people who have had an anaphylactic reaction (severe allergic reaction) to any of the components of the vaccine, or to any of the substances found at trace (very low) levels in the vaccine, such as eggs, chicken protein, ovalbumin (a protein in egg white), formaldehyde, gentamicin sulphate (an antibiotic) and sodium deoxycholate.