We have vaccinated but according to the CDC website, both the MMR and Varicella can be given between 12 and 18 months. Our doctor recommended waiting on the Varicella because I was not sure I was immune, I had to get tested first. I'm not sure this is helpful in the long term but at least the short term hopefully.
Here is a link:
http://www.cdc.gov/vaccines/recs/sch...dule_bw_pr.pdf