Reply #9: Some studies have shown a correlation

[Ms. Toad]

between near simultaneous exposure to mumps and measles and an increased incidence of IBD. That's why I support administering the MMR vaccine as at least two, and perhaps three, separate vaccinations. The cost is relatively small to separate the vaccinations in time - so why risk the correlation actually being causation (or a contributing factor).

Nothing has shown causation so far, and I am not aware of any correlation between Crohns and measles without close in time proximity exposure to mumps.