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|Empirical observations confirm epidemic theory, showing that the probability of a diphtheria epidemic is reduced to near the vanishing point when 50 to 60 percent of the population have been rendered resistant either by previous infection or immunization. When a population has a level of lifelong immunity to a certain disease such that an epidemic of that disease cannot occur, the population is said to have herd immunity.|
Or is it not common knowledge that vaccination does not confer lifelong immunity?
I'm also thankful I know a lot of non-vax families-- because otherwise he might not be exposed to some of those things that he should be.
If the people let government decide what foods they eat and what medicines they take, their bodies will soon be in as sorry a state as are the souls of those who live under tyranny." Thomas Jefferson.
That's very true. This is why herd immunity doesn't protect the unvaccinated. Its been demonstrated that measles and mumps can be transmitted even when 95% of the population is immune. It just doesn't work that way in real life. The theory is flawed in that regard.
|"Serological evidence indicates that measles virus could circulate in seropositive, fully protected populations... Although viral transmission between protected individuals has never been directly demonstrated, the data describe a population in which protected but infectious persons could potentially be of epidemiological importance."|
|"The overall attack rate is the highest reported to date (and to our knowledge) for a population demonstrating virtually complete mumps vaccine coverage... Vaccination failure may play an important role in contemporary mumps outbreaks. We found no evidence to indicate that waning immunity (secondary vaccine failure) contributed significantly to this outbreak."|
|"Despite high vaccination levels, explosive measles outbreaks may occur in secondary schools due to 1) airborne measles transmission, 2) high contact rates, 3) inaccurate school vaccination records, or 4) inadequate immunity from vaccinations at younger ages."|
|"Outbreaks among school-age persons ranged in size from 5 to 363 cases (median, 25); a median of 60 percent of the cases occurred in vaccinated persons, and a median of only 27 percent of the cases were preventable. The outbreaks among preschool-age children indicate deficiencies in the implementation of the national measles-elimination strategy. However, the extent of measles transmission among highly vaccinated school-age populations suggests that additional strategies, such as selective or mass revaccination, may be necessary to prevent such outbreaks."|
|"This outbreak demonstrates that transmission of measles can occur within a school population with a documented immunization level of 100%."|
|"The outbreak demonstrated that mumps can sometimes transmit efficiently in highly vaccinated populations."|
Also, I have been wondering how my children will be able to get the childhood diseases in a highly vaccinated population. I really am much more comfortable with my DC having the diseases when they are children.... I am still looking into this, but are there any mama's here who have personal experience with the childhood diseases in a highly vaccinated population? (I'm talking mumps, measles, rubella, chickenpox)
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