Summary
The majority of the current mumps cases have occurred in people who received the proper two doses of measles-mumps-rubella (MMR) vaccine.
"In 5 percent of the people, the vaccine didn't take," said Kevin Teale, spokesman for the Iowa Department of Public Health. "These people did not develop the proper immune response."See the full content of this document
Extract
Vaccine Only 95% Effective
The lack of an imm...
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