Mumps Virus and the Vaccine

Mumps – The Virus and It’s Effect

“Mumps typically starts with a few days of fever, headache, muscle aches, tiredness, and loss of appetite, and is followed by swelling of salivary glands.” – CDC, 2014

“The annual average of mumps cases in the U.S. in the two decades preceding the 2006 outbreak was 265.” – Forbes, 2012

No mumps-related deaths were reported in the 2006 or the 2009–2010 U.S. outbreaks.” – CDC, 2014

U.S. Annual Mortality Rate for Mumps

Less than 1 death per year


Vaccine Effectiveness

The MMR is always touted as being ‘safe and effective.’ It’s ‘safety’ is well documented to be less than advertised, causing all sorts of adverse events from encephalitis to febrile seizures as stated on The Measles Virus & the Vaccine page. So there are built-in, inherent risks in taking the vaccine, so just how effective is it from preventing the disease? It turns out it is less than effective, ranging anywhere from 80% to 95% effective.

“The effectiveness of prior vaccination with 1 dose of vaccine ranged from 72.8% to 91% for the Jeryl Lynn strain, from 54.4% to 93% for the Urabe strain, and from 0% to 33% for the Rubini strain. Vaccine effectiveness after 2 doses of mumps vaccine was reported in 3 outbreaks and ranged from 91% to 94.6%.” – Clinical Infectious Diseases, 2008

According to Merck’s package insert for their MMR vaccine, the following has been causally associated with the mumps strain of the vaccine, “Cases of aseptic meningitis have been reported to VAERS following measles, mumps, and rubella vaccination. Although a causal relationship between the Urabe strain of mumps vaccine and aseptic meningitis has been shown, there is no evidence to link Jeryl LynnTM mumps vaccine to aseptic meningitis.” – Merck & Co., Inc., 2014

“The vaccine is about 85% effective, meaning there are some people who won’t be immune despite being vaccinated.” – USA Today, 2014Mumps Outbreak at OSU, Why Now

The local Ohio ABC News admits that the MMR only protects people from the Mumps 80% of the time.

 Merck overstated the effectiveness of its MMR vaccine for a decade probably causing large outbreaks of Mumps in 2006 and 2009. – Forbes, 2012

“Mumps outbreaks have also occurred among populations with high 2-dose coverage. For example, in 2006, a series of mumps outbreaks occurred in the United States, despite 2-dose vaccination coverage >95%, and in some investigations, >99% of patients had been vaccinated with 2 doses of vaccine.” – Clinical Infectious Diseases, 2008

For more info on the dangers of the MMR, visit The Measles Virus and the Vaccine page.


Outbreaks Occur in the Vaccinated Population

The following outbreaks are all independent from each other, happening in different parts of the country and in different years, but they all had one thing in common, each of the cases occurred in highly vaccinated populations.

“So far, there have been 43 confirmed cases of the mumps since April. Officials at the Champaign-Urbana Public Health District say it started on the University of Illinois campus. Now, it’s spreading to others in the surrounding community. Many of those contracting the virus are vaccinated against it.” – NBC WAND-17 Illinois, 2015

“COLUMBIA, Mo. – The Columbia/Boone County Health Department says five suspected cases of mumps are now confirmed. The health department said all five students were vaccinated.” – ABC News – 17 Missouri, 2015

“From October 1988 to April 1989, a large mumps outbreak occurred in Douglas County, Kansas. Of the 269 cases, 208 (77.3%) occurred among primary and secondary school students, of whom 203 (97.6%) had documentation of mumps vaccination.” – Journal of Pediatrics, 1991

“Between October 3 and November 23, 1990, clinical mumps developed in 54 students (attack rate, 18%), 53 of whom had been vaccinatedVaccination failure may play an important role in contemporary mumps outbreaks.” – Archives of Pediatric & Adolescent Medicine, 1995

“It refers to a 2006 mumps outbreak in the Midwest, in which 6,500 cases were reported among a highly vaccinated population.” – Forbes, 2012

“A mumps epidemic is sweeping across Iowa in the nation’s biggest outbreak in at least 17 years, baffling health officials and worrying parents…Of the 245 patients this year, at least 66% had had the recommended two-shot vaccination, while 14% had received one dose, the Public Health Department said.”- USA Today, 2006

“The Orange County Health Department (OCHD), New York State Department of Health (NYS DOH), and the Centers for Disease Control and Prevention conducted a mumps investigation in an affected village with a highly vaccinated population…Of the 658 cases with known vaccination history, 83.6% had documentation of 2 doses of mumps containing vaccine.” – Human Vaccines & Immunotherapeutics, 2014

“Health officials have linked the outbreak to an 11-year-old boy at the camp…’He was completely vaccinated,’ Pirutinsky said. ‘So it was a surprise to us he came down with mumps.'” – CNN, 2010

In 2014, Ohio State University mumps outbreak consisted of 63 cases with “the majority of those infected had received at least one round of the vaccinations for measles, mumps and rubella.” Reuters, 2014

In 2014, a New Jersey college in Hoboken had 8 students who came down with the mumps. “All were fully vaccinated with two documented doses of mumps-containing vaccine.” – Fox NY, 2014

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