Hertil kommer, at andre uønskede hændelser er rapporteret under anvendelse efter markedsføringen af ProQuad og/ eller i kliniske forsøg og efter markedsføring af enten MFR- vaccinen fremstillet af Merck & Co., Inc., vacciner med de monovalente komponenter svarende til MFR - vaccinen fremstillet af Merck & Co., Inc. eller levende skoldkoppevaccine (Oka/ Merck).
Additionally, other adverse experiences have been reported with post- marketing use of ProQuad and/ or in clinical studies and post-marketing use of either the measles, mumps, and rubella vaccine manufactured by Merck & Co., Inc., the monovalent component vaccines of the measles, mumps, and rubella vaccine manufactured by Merck & Co., Inc., or Varicella Vaccine live (Oka/ Merck).