ProQuad® (Measles, Mumps, Rubella and Varicella Virus Vaccine Live) Supply Projection 
We Anticipate That ProQuad Will No Longer Be Available for Order in Late February/Early March 2011.

Dear Vaccine Purchaser:
This letter provides an update on the availability of ProQuad. We are currently projecting that ProQuad will no longer be available for order in late February/early March 2011. Once current supplies are exhausted, ProQuad is not expected to be available through the remainder of 2011.
NOTE: VARIVAX® (Varicella Virus Vaccine Live) and M-M-R®II (Measles, Mumps, and Rubella Virus Vaccine Live) continue to be available. Appropriate children may be vaccinated against measles, mumps, rubella, and varicella with these vaccines as indicated.
At this time it is too early to determine whether new supplies of ProQuad will be available in 2012. For the most up-to-date information about the supply of ProQuad and all Merck vaccines, please refer to MerckVaccines.com®. Our representatives will also have timely updates to provide to you.
Merck Vaccine Division