Mumps Virus Epidemiology and Vaccine Effectiveness
Summary
Mumps virus remains a global public health concern despite widespread implementation of measles–mumps–rubella (MMR) vaccination programmes. Introduction of two-dose MMR schedules led to a dramatic decline in incidence and complications such as orchitis and meningitis. However, in several countries a resurgence of mumps has been observed among adolescents and young adults, often within highly vaccinated communities. This resurgence reflects a combination of factors including waning immunity over time, heterogeneous vaccine uptake, viral transmission in densely populated settings and occasional mismatch between vaccine and circulating genotypes. Vaccine effectiveness is high in the first years following immunisation but may decline, leading to outbreaks in settings such as universities and military barracks. To mitigate these events, health authorities have recommended third-dose booster campaigns for groups at elevated risk during outbreaks. Advances in molecular epidemiology have enabled genome-based tracing of transmission chains, revealing persistent lineages despite high coverage and demonstrating that viral evolution alone has not driven vaccine escape. Practical applications of this research include refining immunisation schedules, targeting booster doses, improving surveillance of genotype circulation and exploring next-generation vaccine formulations. Efforts to maintain high coverage, monitor immunity over time and integrate genomic surveillance are central to controlling mumps globally and preventing severe complications.
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Mumps Virus Epidemiology and Vaccine Effectiveness publication trend
The graph below shows the total number of articles in mumps virus epidemiology and vaccine effectiveness across all publications each year (not limited to Nature Index journals).
Technical terms
Vaccine effectiveness: The percentage reduction in disease incidence among vaccinated individuals compared with unvaccinated individuals under field conditions.
Waning immunity: The gradual loss of protective immune response following vaccination, leading to increased susceptibility over time.
Seroconversion: The development of detectable specific antibodies in the blood serum as a result of infection or immunisation.
Genotype: A classification of virus strains based on genetic sequence, used to monitor circulating variants and transmission patterns.
References
- Recommendation of the Advisory Committee on Immunization Practices for Use of a Third Dose of Mumps Virus–Containing Vaccine in Persons at Increased Risk for Mumps During an Outbreak. MMWR Morbidity and Mortality Weekly Report (2018).
- Waning immunity against mumps in vaccinated young adults, France 2013.. Eurosurveillance (2016).
- Combining genomics and epidemiology to track mumps virus transmission in the United States. PLOS Biology (2020).
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