What are the absolute contraindications to childhood vaccination?
True contraindications to the childhood vaccines are extremely rare (see relevant chapters), and include only anaphylactic sensitivity to any of the particular vaccine’s components, and an anaphylactic event following a previous dose of that vaccine. NB: An anaphylactic reaction to eggs does not contraindicate MMR vaccine, as the vaccine viruses are not grown in eggs and the vaccine does not contain any egg protein3 (see Part 3.13, ’Measles’).