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- Title
Mumps Vaccine Performance among University Students during a Mumps Outbreak.
- Authors
Cortese, Margaret M.; Jordan, Hannah T.; Curns, Aaron T.; Quinlan, Patricia A.; Ens, Kim A.; Denning, Patricia M.; Dayan, Gustavo H.
- Abstract
Background. The largest reported mumps outbreak at a US college in 19 years occurred in 2006 at a Kansas university with a 2-dose measles-mumps-rubella (MMR) vaccination policy. We assessed vaccine performance and mumps risk factors, including the possibility of waning vaccine protection. Methods. Case students were compared with a cohort of the university's ~19,000 undergraduates. The secondary attack rate for clinical mumps was determined among roommates exposed to case students. Time from receipt of the second dose of MMR vaccine was compared between case students and roommates without mumps. Results. Coverage with ⩾2 dose of MMR vaccine was ⩾95% among 140 undergraduate case students and 444 cohort students. The secondary attack rate for clinical mumps among roommates who had received 2 doses of vaccine ranged from 2.2% to 7.7%, depending on the case definition. Compared with roommates without mumps, case students were more likely (odds ratio, 2.46; 95% confidence interval, 1.25-4.82) to have received their second dose of MMR vaccine ⩾10 years earlier. The odds of being a case student increased with each 1- year increase in time from receipt of the second dose of MMR vaccine (odds ratio, 1.36; 95% confidence interval, 1.10-1.68) among case students and roommates aged 18-19 years but not among those aged ⩾20 years. Students aged 18-19 years had a higher risk of mumps (risk ratio, 3.14; 95% confidence interval, 1.60-6.16), compared with students aged ⩾22 years; women living in dormitories had increased risk of mumps (risk ratio, 1.95; 95% confidence interval, 1.01-3.76), compared with men not living in dormitories. Conclusion. High 2-dose MMR coverage protected many students from developing mumps but was not sufficient to prevent the mumps outbreak. Vaccine-induced protection may wane. Similar US settings where large numbers of young adults from wild-type naive cohorts live closely together may be at particular risk for mumps outbreaks.
- Subjects
UNITED States; MMR vaccines; PREVENTIVE medicine; MUMPS vaccines; MEASLES vaccines; VACCINATION; HEALTH of college students; STATISTICAL hypothesis testing; COHORT analysis; CASE studies; MEDICAL research; DISEASE outbreaks
- Publication
Clinical Infectious Diseases, 2008, Vol 46, Issue 8, p1172
- ISSN
1058-4838
- Publication type
Article
- DOI
10.1086/529141