Q: Who exactly is recommending a third MMR dose?

A: Public health authorities near you

During a recent Twitter exchange, Andre Picard, the Globe and Mail’s health columnist, asked me “who exactly is recommending a third MMR dose” after I referred to increasing interest in extra shots. One answer: Public Health Agency of Canada. On its website, it now states: “Prevention of infection by immunization is not just for children; adults require immunization to address waning immunity against some vaccine preventable diseases.” The measles vaccine is such a disease.

PHAC then goes on to explain that “All adults in Canada without contraindications should be routinely immunized against vaccine preventable diseases.” In its “Recommendations for routine immunization,” PHAC recommends one additional MMR dose for susceptible adults born after 1970. Many of those adults would have had two previous MMR shots and many of them would be susceptible, either because the vaccine waned or because it never took.

PHAC then ups its recommendation for susceptible adults to two additional doses for those considered to be at specific risk — these include anyone travelling outside North America, any student in a post-secondary educational setting and any military or health care personnel.

CDC’s recommendations somewhat align with PHAC’s. On both sides of the border, the health care community is coming to terms with what may well turn out to be a life-long need to be re-vaccinated.

Last April an article in the Ottawa Citizen, “Adults vaccinated against measles decades ago aren’t all immune, experts say,” confronted the issue of waning immunity and made the case for upping the number of doses. “There is a concern we may need to vaccinate more — double dosing for adults as we do for children,” said virologist Earl Brown, a professor emeritus at the University of Ottawa.”

And this January, interest in additional measles vaccination became evident following the outbreak at Disneyland. “Have you had you’re your measles shot? “Maybe you need another,” a January article on the NBC News website, reported that “many adults who were vaccinated for measles decades ago as children are now highly susceptible to the virus—perhaps as many as one in 10 of those who were immunized, infectious disease experts say.” The upshot is that “previously immunized adults should consider getting measles booster shots, said Dr. James Cherry, who specializes in pediatric infectious diseases at Mattel Children’s Hospital UCLA in Los Angeles.

“’It may well be important in the future we should give additional doses to adults … we have people … who are now 40 years out from vaccination and so some of these people will get measles because their protection has dropped.”

The good news: Experts believe that additional MMR shots for adults would be very safe.


  1. From the CDC January 2015:

    “Limited data exist on the safety of the measles, mumps, and rubella (MMR) vaccine in adults.”

    That’s as of this year. They looked at VAERS data, which is a voluntary reporting system, to see what the adverse reaction rate is in adults and conclude “In our review of VAERS data, we did not detect any new or unexpected safety concerns for MMR vaccination in adults.”

    Nothing new or expected, so what DID they find? As they now recommend widespread MMR vaccination of adults, it must be pointed out they have no population wide safety data to point to. Adults have not been routinely vaccinated with MMR. We do not know what the risks and efficacy are in adults. Are they going to follow up with testing titers for this mass vaccination campaign to know if it was effective? What are the risks for adults with chronic health conditions or taking medications? Will the MMR interact with certain medications?


    Liked by 1 person

  2. It’s evident that we’ve traded life long natural immunity for temporary artificial immunity. Good for the pharmaceutical industry. Bad for individuals who will be exposed to increasingly more risk of vaccine injury.


  3. In the vaccine insert for the Merck MMR vaccine, of the Rubella portion of the vaccine they state that 12-26% of adult women develop temporary (or rarely, permanent) arthritis, arthralgia, &/or myalgia after vaccination. “Symptoms may persist for a matter of months or on rare occasions for years.” Those are pretty high odds. Will they warn adult women of these odds ahead of time? Will they give us a choice to decline? And if protection has already waned for those who were vaccinated as children, how long before a fifth booster is needed? Do we know if the risk of adverse effects increases with additional doses? What will be the effect on the elderly when they reach their most vulnerable time of life and are no longer immune so must submit to yet another booster? And this is just one vaccine. What happens to our long-term health when the entire CDC adult schedule is piled on top of an already “robust” childhood schedule? These are important unanswered questions, and whether we remain free to choose vaccination or not, we are all part of a huge medical experiment.

    Liked by 1 person

    • Hmmmm Makes you wonder if it’s better catching measles, mumps and chicken pox as a child to continuous toxic jabs.


  4. Government/Pharma guinea pigs…that’s all we are. If we aren’t “viable” off with our heads.


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