Don't know where that 95%+ comes from.  It's 91.6% in the UK for MMR.  It's also known that there are clusters of lower coverage.


On 08-Aug-18 11:12 AM, Juan Gérvas wrote:
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-the question is about bad science for explaining vaccines herd inmunity
-but Spain and the UK don’t have mandatory vaccination, and vaccine coverage is well over 95%.
-having not a compulsoy vaccination policy is not anti-science movement
-what is the EBM for compulsory vaccination except in emergency situations?
-see:
Restrictions should only be placed after meeting certain conditions to ensure judicious use of this power.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1592474/

It is a reasonable argument that all children should be vaccinated for the protection of society; however, vaccination policies outside the UK demonstrate that compulsion does not guarantee high rates of immunisation, and that education and engagement can be highly successful.
http://ojs.lib.ucl.ac.uk/index.php/up/article/view/1383

An educational program should be set up to explain to Vaccination staff  the value and worth of voluntary compared to mandatory vaccination and  why high vaccination rates do not have to depend on compulsion.
https://bmchealthservres.biomedcentral.com/articles/10.1186/1472-6963-9-100
-un saludo juan gérvas @JuanGrvas

El mié., 8 ago. 2018 a las 11:54, Iovine Roberto (<[log in to unmask]>) escribió:

so we need more compulsory vaccination, well over the 95% of the population.
i am afraid the italian government is about to introduce a non-compulsory politic.
poor italy, the country of Galileo is going to lead the anti-science movement
roberto iovine 

Da: "Juan Gérvas" <[log in to unmask]>
A: [log in to unmask]
Inviato: Mercoledì, 8 agosto 2018 11:38:35
Oggetto: herd inmunity, no so simply

-an example of vaccines oversimplification, bad science
-this "explorable" is full of mistakes and errors:
This explorable illustrates the mechanism of herd immunity.  When an infectious disease spreads in a population, an individual can  be protected by a vaccine that delivers immunity. But there's a greater  good. Immunization not only projects the individual directly. The immunized  person will also never transmit the disease to others, effectively  reducing the likelihood that the disease can proliferate in the  population. Because of this, a disease can be eradicated even if not the  entire population is immunized. This population wide effect is known as  herd immunity.
-1/ "The system is initially fully susceptible with a few infected individuals randomly scattered into the population". Usually, many individuals without the vaccination are not susceptible, but immunized because the natural infection.
-2/ "An infected individual remains infectious for some time, recover subsequently, and become susceptible again". In many cases, an infected individual recover subsequently, and become protected for the whole life.
-3/ "The immunized person will also never transmit the disease to others" In some case yes, in others no. See the diphtheria vaccine. Vaccinated individuals can carrier toxigenic diphtheria germs and transmit the disease to others.
-4/ In most cases (except perhaps for the vaccine of yellow fever) "inmunity" is not for ever. Most vaccines simply delaye the "window" for infections (they are time bombs). This is the case of measles vaccine and why in New Zealdand will add a supplementary (3rd shot)
-the author could help readers with a "note" as: "This a theoretical situation. In practice the situation of the naive American indians when the Spaniards arrived with measles, for example (a new disease in America). [but at that time we have no measles vaccine] Or, when developing a vaccine against gonorrhea, where a protective immune response is absent (by contrast syphilis infection produces a partially protective immunity) "
-it is not so simple. Herd immunity. Measles. The 95% coverage mantra. Measles outbreak with more than 97% coverage (Navarra, Spain; Porto, Portugal; Gothenburg, Sweden And many vaccines have no heard inmunity at all: tetanus, rabies, diphtheria,...
-un saludo juan gérvas @JuanGrvas


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