Mumps risk factors

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-In-Chief: Lakshmi Gopalakrishnan, M.B.B.S. [2]; Nate Michalak, B.A.

Risk factors for mumps include: unvaccinated individuals who do not have evidence of immunity, belonging to the age group 2-12 years, international travel, especially to countries without mumps vaccination programs, working or living in close proximity to individual(s) infected with Rubulavirus, and being in states of immunodeficiency.

• Unvaccinated individuals who do not have evidence of immunity.

• Acceptable presumptive evidence of immunity to mumps includes: documented administration of two doses of live mumps virus vaccine at least 28 days apart, on or after the first birthday; laboratory evidence of immunity; birth before 1957; or documentation of physician-diagnosed mumps.
• Individuals with only 1 dose of the MMR or MMRV vaccine are at higher risk than those with 2 doses.
• Individuals with 2 doses of the MMR or MMRV vaccine are still at risk since the vaccines are not 100% effective at preventing mumps.

• Children between 2 and 12 years old are at the highest risk for contracting mumps.
• International travel, especially to countries without mumps vaccination programs.^[1]
• Working or living in close proximity to individual(s) infected with Rubulavirus (e.g. classrooms, college dormatories).
• Individuals in states of immunodeficiency.^[2]

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