The mumps vaccine strain produces a mild, non-communicable infection. Post-licensure studies determined that one dose of measles-mumps-rubella (MMR) vaccine is about 78% effective in disease prevention, while two doses are about 88% effective.
a) During World War I, only influenza and gonorrhea were more common infectious causes of hospitalization among soldiers than mumps.
b) In 1967, mumps accounted for about 35% of all reported cases of encephalitis in the United States.
c) Infectious causes of parotitis include parainfluenza viruses, Epstein-Barr virus, influenza A virus, enteroviruses, lymphocytic choriomeningitis virus and HIV.
d) In a vaccinated adolescent, diagnosis of a breakthrough mumps infection can be ruled out with a negative serum IgM result.
e) Mumps is as contagious as varicella or measles.
Answer: a, b and c are true