It appears that your browser has cookies Varivax for adults. This is especially important for people who are exposed Varivax for adults chickenpox and do not have immunity against the disease and are not eligible for vaccination. It is not known whether varicella vaccine virus is excreted in human milk. Chickenpox is a very contagious disease caused by the varicella-zoster virus VZV. You are about to leave MerckVaccines.