Vaccine refusal linked to recent U.S. measles outbreak, study suggests

CBC News

Measles, a disease that was considered eliminated 16 years ago in the U.S., has made a comeback in which a “substantial proportion” of the cases are associated with vaccine refusal, a study suggests.

The study, recently published in the March 15 issue of the Journal of the American Medical Association, says “the phenomenon of vaccine refusal” increases the risk for measles among individuals who are not vaccinated or refuse to get vaccinated, and also among those who are already fully vaccinated.  

Researchers took into consideration 18 measles studies published since the disease was declared eliminated in the U.S. on Jan. 1, 2000, through Nov. 30, 2015. They found that of the 1,416 measles cases reported in the U.S. during that time span, 804 cases, or 56.8 per cent, had no medical history or record of receiving the vaccine, as opposed to the 199 cases, or 14.1 per cent, involving individuals who did.

Of the 970 cases in which such data could be extrapolated, 574 cases involved individuals who were unvaccinated despite being eligible to receive one, and 405 of those had nonmedical exemptions — such as exemptions for religious, moral or philosophical reasons — as opposed to medical contraindications.

The study notes the increase of measles incidents was initially seen only among states where nonmedical exemptions were readily offered, but states with “moderately difficult” exemption procedures have experienced increases in measles rates as nonmedical exemptions have “steadily increased” in the last 20 years.

Researchers also said a higher rate of vaccine exemption or refusal in a community is associated with increased incidences of measles in that community, among persons with and without exemptions.

The study points to a 2014 outbreak of measles that originated at Disneyland in Anaheim, Calif.

Of the 111 measles cases reported from the outbreak, approximately half were unvaccinated individuals, most of whom were eligible for vaccination yet remained unvaccinated.

“A substantial proportion of the U.S. measles cases in the era after elimination were intentionally unvaccinated,” researchers concluded. “The phenomenon of vaccine refusal was associated with an increased risk for measles among people who refuse vaccines and among fully vaccinated individuals.”

Researchers note the link between vaccine refusal and increased risk of contracting vaccine-preventable diseases is “imperfectly defined” and said the association between the two could be population- and disease-specific.

The study also looked at 32 reports of pertussis outbreaks and found that, in the five largest statewide outbreaks in the U.S., those who were unvaccinated or undervaccinated ranged from 25 to 45 per cent of those who contracted it.

Although vaccine refusal was associated with an increased risk of contracting the virus widely known as whooping cough, the researchers noted several outbreaks occurred in highly vaccinated populations, indicating a possibly waning immunity to pertussis.

Unvaccinated children vulnerable

Children with vaccine exemptions were 22 times more likely to acquire measles than fully vaccinated children, according to one study cited by researchers, which used data from Colorado measles cases from 1987 through 1998.

The risk was highest among children with exemptions between the ages of three and 10 years old. Among vaccinated children who contracted measles, 11 per cent contracted the disease from an individual with an exemption.

“The most direct measure of vaccine refusal is the rate of parents claiming nonmedical exemptions to school immunization requirements,” researchers wrote.

Of all the measles cases since 2000, the study says 178 involved children younger than 12 months.

Researchers suggest the study has “broad implications” for vaccine policy in the U.S., including the possible overriding of parents’ decisions to not vaccinate their children.

“Fundamental to the strength and legitimacy of justification to override parental decisions to refuse a vaccine for their child is a clear demonstration that the risks and harms to the child of remaining unimmunized are substantial,” researchers wrote.

Measles prevention comes in two doses of a vaccine, including the measles-mumps-rubella (MMR) immunization or measles-mumps-rubella-varicella (MMRV) immunization.

The needle vaccine is given to children first between the ages of 12 to 15 months and again at 18 months or four to six years, depending on the province or territory.

Public Health says the vaccine is safe, effective and free. There can be some mild side-effects, however, including redness or soreness where the needle went in, as well as slight fever, skin rash and swollen glands.

A single dose is considered to have up to a 95 per cent effectiveness rate, which rises to 99 per cent with the two doses recommended.

http://www.cbc.ca/news/health/vaccination-refusal-measles-outbreak-study-1.3490506

Jim

15 thoughts on “Vaccine refusal linked to recent U.S. measles outbreak, study suggests

  1. See where they’re going with this? For National Security reasons, mandatory vaccinations will be ordered.

  2. Another MSM LIE. the measles outbreak can and has been physically linked to the influx of illegals into America in the last 4 yrs. other diseases under control are now out of control due to the influx of diseased illegals……whooping cough is one as well as the “386” strain of pneumonia
    which is directly linked to the influx of illegals from el-salvador. nuff said.

    the criminals bum-rush u.s. people with diseased illegals and then try and
    bullshiite us with propaganda to get even more of their deadly elixir controlled death-toxin shots.

  3. “diseased illegals”. Lice infested, whooping cough infected, and only God knows what else this trash is bringing into this country.

    Just remember, these “diseased illegal” children are attending a school near you, with your children or grandchildren! Of course, they’re vaccinated, right? Are they de-loused? They should “dip” ’em, and shave ’em if they’re gonna let ’em stay here. What? Uncalled for? I don’t think so. They should be booted back across the border but they’d just be back the next day. I say it’s “open season”! I suppose they’d arrest you if you shot an “illegal” because they’d call it illegal. How F’ed up is that? Try sneaking into Russia!

  4. “A single dose is considered to have up to a 95 per cent effectiveness rate,…

    … of either killing the victim outright, or slowly… until the next toxic injection.”

  5. Bullshit,

    The return of measles is because we let filth in from other countries. Obama has committed treason because of this garbage.

    IT HAS NOTHING TO DO WITH REFUSALS…..

  6. I will NOT be forced to get any Vaccination. I would get a TB probly, i guess one i know or Polio, or Hepatitis, maybe because i grew up w those things? I think it Criminal people are already forced. I have read, my Hsbnd is Ret. AF so we have TriCare. I am on Soc Sec and Medicare(not by choice), my information said i will lose all those privileges. I am prepared to do so when that time comes. Thats one thing i didnt like about Carson

  7. I really think they’re shooting themselves in the foot with this nonsense, because anyone who doubted the propaganda machine at all, is now completely convinced that they’re totally full of schit.

    Everyone knows where the measles came from, and everyone knows the “anti-vaxxers” we never responsible for any illnesses in the past. Now all of a sudden they’re typhoid Marys?

    ridiculous, and everyone knows it.

    1. I’m not sure we have to do much more in the propaganda war, because their lies are becoming so desperate and obvious, and so many of them have been exposed, that only a complete idiot can fail to see the writing on the wall.

      They’ve (media & gov’t) lost all credibility, and with it, their control of the population. Because of this, they’ve become expendable to the bankers, who will either have to deal with Trump (if they don’t already own him) to retain control here, or launch an all-out violent attack against us.

  8. The measles VACCINE=cancer production………the ‘wild measles’, that which one acquires naturally, offers protection from cancer

  9. If vaccinations are so great, then why bother those of us who do not want them??? We “swim at our own risk.” However, THEY are proving our case for non vaccinating by trying to force it upon ALL people, thereby proving that there is something more to these poisonous injections than just protection from some random little childhood disease. I had the measles as a child and so did everyone I knew and went to school with. I never heard of ANY complications with that particular disease nor any other childhood disease. And…knowing what I now know, I’m pretty sure that all these diseases were manufactured in some research lab.

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