Substantial proportion of US measles cases intentionally unvaccinated

Good job Robert F. Kennedy, Jr., Jenny McCarthy, Dierdre Imus and the rest of the anti-vaxx airheads.

The media release is below.

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Substantial proportion of US measles cases intentionally unvaccinated
THE JAMA NETWORK JOURNALS

An analysis of numerous studies and reports finds that unvaccinated or undervaccinated individuals comprised substantial proportions of cases in measles and some pertussis outbreaks, and vaccine refusal was associated with an elevated risk for measles and pertussis, including among fully vaccinated individuals, according to a study appearing in the March 15 issue of JAMA.

Recent outbreaks of vaccine-preventable diseases in the United States have prompted clinicians, public health officials and the public to pay greater attention to the growing phenomenon of vaccine refusal and hesitancy. Improved understanding of the association between vaccine refusal and the epidemiology of these diseases is needed. Saad B. Omer, M.B.B.S., M.P.H., Ph.D., of Emory University, Atlanta, and colleagues examined the association between vaccine delay, refusal, or exemption and the epidemiology of measles and pertussis, two vaccine-preventable diseases with recent U.S. outbreaks. The authors searched the medical literature for reports of U.S. measles outbreaks that have occurred since measles was declared eliminated in the United States (after January 1, 2000), endemic and epidemic pertussis since the lowest point in U.S. pertussis incidence (after January 1, 1977), and for studies that assessed disease risk in the context of vaccine delay or exemption.

The researchers identified 18 published measles studies, which described 1,416 measles cases (individual age range, 2 weeks-84 years; 178 cases younger than 12 months) and more than half (57 percent) had no history of measles vaccination. Of the 970 measles cases with detailed vaccination data, 574 cases were unvaccinated despite being vaccine eligible and 71 percent of these had nonmedical exemptions (e.g., for religious or philosophical reasons, as opposed to medical contraindications; 42 percent of total).

Among 32 reports of pertussis outbreaks, which included 10,609 individuals for whom vaccination status was reported (age range, 10 days-87 years), the 5 largest statewide epidemics had substantial proportions (range, 24 percent-45 percent) of unvaccinated or undervaccinated individuals. However, several pertussis outbreaks also occurred in highly vaccinated populations, indicating waning immunity. Nine reports (describing 12 outbreaks) provided detailed vaccination data on unimmunized cases; among 8 of these outbreaks, from 59 percent through 93 percent of unvaccinated individuals were intentionally unvaccinated.

“This review has broad implications for vaccine practice and policy. For instance, fundamental to the strength and legitimacy of justifications 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. Similarly, central to any justification to restrict individual freedom by mandating vaccines to prevent harm to others is an understanding of the nature and magnitude of these risks and harms. However, the risks of vaccine refusal remain imperfectly defined, and the association between vaccine refusal and vaccine-preventable diseases may be both population- and disease-specific,” the authors write.

Editor’s Note: This work is supported by an award from the Emory Vaccinology Training Program of the National Institute of Allergy and Infectious Diseases. Please see the article for additional information, including other authors, author contributions and affiliations, financial disclosures, etc.

Editorial: Toward High-Reliability Vaccination Efforts in the United States

“Without a centralized infrastructure focused on the goal of maximizing community immunity, high-reliability vaccine coverage remains challenging in the United States,” writes Matthew M. Davis, M.D., M.A.P.P., of the University of Michigan, Ann Arbor, in an accompanying editorial.

“Nonetheless, if vaccines are developed for emerging diseases that threaten the U.S. population–such as Zika, Ebola, or human immunodeficiency virus–the public will likely expect the currently complex and heterogeneous vaccination system in the United States to function as a seamless organization. The U.S. population wants vaccination to be safe, effective and available in a timely manner, and for immunization to be durable. Current challenges with measles and pertussis outbreaks provide an opportunity to develop and evaluate approaches to achieve unprecedented levels of vaccination coverage, limit waning immunity, and minimize vaccine-preventable disease for children and adults alike.”

(doi:10.1001/jama.2016.1529; this editorial is available pre-embargo at the For The Media website.)

Editor’s Note: The author has completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest and none were reported.

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One thought on “Substantial proportion of US measles cases intentionally unvaccinated”

  1. ‘Good job Robert F. Kennedy, Jr., Jenny McCarthy, Dierdre Imus and the rest of the anti-vaxx airheads.’

    I am surprised that Junk Science should be so dismissive of people conerned about the safety of some vaccine therapies especially as the US government accepts the probability that they are correct by paying over $2.5 billions to people supposedly damaged through their administration.
    http://www.hrsa.gov/vaccinecompensation/

    Plus surely Junk Science of all websites must respect the individual rights of a person to be in control of their own body.

    “What is the Primary Fundamental Right?

    The Primary Fundamental Right is the most basic of all pre-political human rights. It is the innate right of a person to the ownership of their own body and the right to do what they want to that body.

    People who don’t believe that the Primary Fundamental Right exists should ask themselves this question; can you do anything you want to your body and not have the possibility of going to jail for doing so? The answer is definitely no. Because of legal constraints we are all slaves. We are not a free people, regardless of what we may think. Therefore all the freedoms we think we have are really illusions unless we own our own bodies. Remember, only slaves cannot make decisions about their own bodies.

    Every one of us, including the politicians, are now owned by our respective governments because of numerous iniquitous laws, including the drug prohibition laws, statutory rape laws and compulsory vaccination laws that they the politicians have enacted supposedly on instruction from the majority of voters. In reality we have all been caught up in a swirling Socialism torrent sliding downwards towards Totalitarianism for over 100 years. The drug prohibition laws are a symptom of that progression, but not the root cause.”
    http://www.primaryfundamentalright.org/index.php?pageName=pfrWhatIs

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