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Introduction: Measles, mumps, and rubella incidence decreased drastically following vaccination programs' implementation. However, measles and mumps' resurgence was recently reported, outbreaks still occur, and challenges remain to control these diseases., Areas Covered: This qualitative narrative review provides an objective appraisal of the literature regarding current challenges in controlling measles, mumps, rubella infections, and interventions to address them., Expert Opinion: While vaccines against measles, mumps, and rubella (including trivalent vaccines) are widely used and effective, challenges to control these diseases are mainly related to insufficient immunization coverage and changing vaccination needs owing to new global environment (e.g. traveling, migration, population density). By understanding disease transmission peculiarities by setting, initiatives are needed to optimize vaccination policies and increase vaccination coverage, which was further negatively impacted by COVID-19 pandemic. Also, awareness of the potential severity of infections and the role of vaccines should increase. Reminder systems, vaccination of disadvantaged, high-risk and difficult-to-reach populations, accessibility of vaccination, healthcare infrastructure, and vaccination services management should improve. Outbreak preparedness should be strengthened, including implementation of high-quality surveillance systems to monitor epidemiology. While the main focus should be on these public health initiatives to increase vaccination coverage, slightly more benefits could come from evolution of current vaccines.

Introduction: Italy (in pilot regions) and Germany (nationwide) were the first European countries to introduce universal varicella vaccination (UVV) programs., Areas Covered: A systematic review was performed to assess varicella epidemiology before UVV programs and the impact of 1-dose and 2-dose UVV programs in Italy and Germany., Expert Opinion: Italy implemented 1- or 2-dose UVV programs successively in eight pilot regions between 2003 and 2011 and nationwide in 2017. Germany implemented 1- and 2-dose UVV programs in 2004 and 2009, respectively. While Italy had two nationwide surveillance systems in place for varicella in the pre-vaccination era, in Germany, a mandatory notification system for varicella was only introduced in the New Federal States 2 years before the 1-dose UVV implementation. Substantial reductions in moderate/severe varicella and varicella-related hospitalization incidence occurred during the 1-dose era. Further reductions were reported in Italy and Germany after the recommendation of a second dose in a long or short schedule, respectively. Different benefit-risk evaluations of a tetravalent varicella-containing vaccine (MMRV) used as a first dose led to different recommendations (MMRV versus MMR+V) in these countries. Vaccination strategies in both countries tailored to country-specific needs and goals led to a reduction in varicella-related health care hospitalization costs.