Ah but you see FrickingFedUp it is because I take measles seriously that I am an advocate of the single vaccine.
Let's face it, most of the discussions around the MMR focus on measles.
Mumps and rubella are rather different diseases with an entirely different risk/benefit ratio and context for the individual than that of measles disease and or vaccination. Which rather makes one wonder what these three viruses are doing in a combined vaccine in the first place. Their profiles are entirely different.
Also, according the the NHS's own website, the protection offered by the MMRII does not have the same duration for the three viruses.
Is MMR protection lifelong?
The immunity that MMR gives is probably lifelong. We know that people remain immune for at least 30 years against measles, 23 years against rubella and 19 years against mumps.
If in the future evidence shows that immunity is fading, it will be decided whether to offer a further dose of MMR to adults, for example.
If those numbers are in any way correct they pose a real problem. By vaccinating children with MMR we are in effect putting them at risk of waning immunity to rubella and mumps at exactly the time these diseases have the potential to be dangerous for them. How is that ethical?
I fear there are many many issues with MMR vaccines and their bad safety record is far from being the only issue.
Of course one other major issue is that it would seem that the protection offered to infants by passive immunity is not nearly as good when the mother has been vaccinated as when she has had measles. www.ncbi.nlm.nih.gov/pubmed/10876898
So many parameters to consider...