Answer
Yes. It contains weakened versions of all four viruses, so it is unsuitable during pregnancy and for some people with severe immune suppression.
Sources for this answer
- Priorix Tetra powder and solvent for solution for injection in pre-filled syringe — Current selected SmPCemc · Summary of Product Characteristics
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.