$MRK News Article - US FDA Approves Intramuscular Administration for Merck's MMRV Family of Vaccines: M-M-RII (Measles, Mumps, and Rubella Virus Vaccine Live), VARIVAX (Varicella Virus Vaccine Live), and ProQuad (Measles, Mumps, Rubella and Varicella Virus Vaccine Live)
https://marketwirenews.com/news-releases/us-f...52617.html