American Medical News, April 28, 2008 UTMB pediatrics professor, Dr. Martin Myers, who is also executive director of the National Network for Immunization Information, is quoted in this article about a study that found that a large percentage of those who got mumps in an outbreak in 2006 had received the recommended two doses of the vaccine for measles, mumps and rubella. Dr. Myers said the study raises the possibility that the vaccine's effectiveness lessens after about 10 years.