"I no longer give or recommend the MMR vaccine.  I think that the risks exceed the benefits.  Obviously, discuss this with your doctor but please know that the CDC declared rubella officially eradicated in the  U.S. in 2005, measles remains a rare disease in America (30-40 cases/year) and mumps is also not very common.  

Mumps can cause decreased fertility in teenage boys who get the illness and suffer testicular infection, but this is a very rare occurrence.

All three of these viruses continue to be associated with severe life-threatening complications in other countries, but the vaccine—including the “split” vaccines—enough risk to outweigh the benefit for healthy North American or European children.”