http://www.sciencedirect.com/science/article/pii/S0896841115300548
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Immunologic risk factors, including maternal infection during pregnancy, autoantibodies to fetal brain proteins, and familial autoimmune disease, have consistently been observed across multiple studies, as have immune abnormalities in individuals with ASD.

VaccinePapers acknowledges the role of Immune Activation during pregnancy, and that Autism occurs without vaccines. In addition to pregnancy immune activation VaccinePapers argues that Autism can occur postnatally citing these cases.
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Here are 4 such case reports/case series and a review of the subject:
Case Series, DeLong 1981: This report describes 3 previously-normal children, ages 5(F), 7.5(M) and 11(F) that developed autism due to brain inflammation from an infectious illness. The authors state:

We report three cases in which striking autistic features developed in previously normal children in the course of an acute encephalopathic illness…
AND
These three children each demonstrated a full-blown autistic syndrome in the course of an acute encephalopathic illness…The cases are presented as examples of an acquired and reversible autistic syndrome in childhood, affording some insight into the neurologic substrate of that syndrome.
AND
…the behavioral syndrome was acquired at a clearly definable time, in the context of an acute encephalopathic illness…

Full paper: Acquired reversible autistic syndrome in acute encephalopathic illness in children

Case Report, Marques, 2013: This report describes a previously healthy 32-month old girl that suffered a viral infection of the nervous system. The child experienced “marked developmental regression, autistic features, persistent stereotypes and aphasia” (aphasia=loss of speech).

The authors described this case as “…encephalitis leading to developmental regression with autism spectrum disorder and correlating these 2 distinct entities.” (encephalitis = brain inflammation)

The authors rule out inborn metabolic disorders as a cause (this argument also applies to the other case reports):

Our patient was previously healthy, with adequate psychomotor development until this infectious episode. Additionally, newborn screening and metabolic tests performed on the admission were negative (normal values for ammonia and lactate) and MRI images do not suggest metabolic disorders. Finally and most importantly, she had a favorable outcome with improvement in all skills and development quotient enhancement. These features do not support an inborn error of metabolism, which are characteristically progressive and lead to severe mental retardation.

Full Paper: Autism Spectrum Disorder Secondary to Enterovirus Encephalitis

Case Report, Ghaziuddin, 2002: This report describes a previously healthy 11 year old boy that developed illness with fever, seizure and brain inflammation. In the following months, the child developed autism, and never fully recovered. The authors state:

On the DSM-IV symptom checklist for autistic disorder, he met all the criteria for autism except the onset criterion because he did not have a history of any symptoms before three years of age.
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The authors state that this case “… provides further evidence that autistic symptoms can sometimes emerge after the age of three years following an external event such as an infection.

Full Paper: Autistic Symptoms Following Herpes Encephalitis

Case Report: Gillberg, 1986: This report describes a previously healthy 14 year old girl that developed illness with fever, seizure and brain inflammation. In the following 70 days, she developed all the symptoms of autism, including echolalia, loss of speech, hand-flapping and other self-stimulating behavior. She never recovered. Gillberg states:

I will describe the case of a 14-year-old-girl who developed all the classical symptoms of autism over a 70-day period after the onset of convulsions in herpes simplex encephalitis (presumptive diagnosis on the basis of clinical, neurochemical, and neurophysiological tests). Only the age criterion is not met, since she was totally psychiatrically healthy up to her 14th year of life.
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Severe autistic features-including gaze aversion, abnormal reactions to sound, delayed and immediate echolalia after initial muteness, typical hand-flapping stereotypies, and the acquisition of a set of routines and insistence on sameness that make everyday life totally restricted-developed over a 3-month period after the onset of encephalitis and still remain.

Full Paper: Onset at age 14 of a typical autistic syndrome: A case report
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Custodio et al 2017: This study observed long-lasting (into adulthood) behavioral and immune system changes in mice exposed to immune activation 5 to 7 days after birth. This age in mice roughly corresponds to human infants at term (i.e., at 36-40 weeks gestation). This is when the hepatitis B vaccine is recommended. The exposed mice had long term brain inflammation. The behavioral and immune system changes were sex-dependent: “Male mice presented depressive- like, risk-taking, anxiety-like, and repetitive behaviors with working memory deficits at periadolescence; while at adulthood, only depressive- and anxiety-like behaviors were observed. In contrast, females only presented PPI (pre-pulse inhibition) deficits in both ages studied.” Paper: Neonatal Immune Challenge with Lipopolysaccharide Triggers Long-lasting Sex- and Age-related Behavioral and Immune/Neurotrophic Alterations in Mice
The aluminum contained in vaccines is similar to that found in a liter (about 1 quart or 32 fluid ounces) of infant formula. While infants receive about 4.4 milligrams* of aluminum in the first six months of life from vaccines, they receive more than that in their diet. Breast-fed infants ingest about 7 milligrams, formula-fed infants ingest about 38 milligrams, and infants who are fed soy formula ingest almost 117 milligrams of aluminum during the first six months of life.
http://www.chop.edu/centers-programs/vaccine-education-center/vaccine-ingredients/aluminum

This is the response to Dr Offit by VaccinePapers.

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For the vaccines given in the first 6 months of life, this statement is exactly wrong. The truth is the opposite of what Offit says. In infants, vaccines produce far higher exposure to aluminum than food.

Vaccines in the first 6 months of the CDC vaccine schedule contain about 3,675 mcg aluminum:
Birth (Hep B): 74 mcg/kg (250 mcg for 3.4 kg infant)
2 month: 245 mcg/kg (1225 mcg for 5 kg infant)
4 month: 150 mcg/kg (975 mcg for 6.5 kg infant)
6 month: 153 mcg/kg (1225 mcg for 8 kg infant)

Total for 0-6 months: 3675 mcg aluminum


Compare this to aluminum absorption (for infants) over the first 6 months from milk and formula. The total amount ingested must be multiplied by 0.3% to obtain the amount actually absorbed into the body. Aluminum content numbers come from CHOP, and I have confirmed them in the scientific literature:
breastmilk: 7mg x 0.3% = 21 mcg (0.021 mg)
formula: 38mg x 0.3% = 114 mcg (0.114 mg)
soy formula: 117mg x 0.3% = 351 mcg (0.351mg)


The 0.3% factor comes from http://vaccinepapers.org/wp-content/uploads/ganrot-aluminum-health-effects1986.pdf
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The most credible information has been obtained by determining urinary excretion rates and regarding that as a minimal amount of absorption. Available information from the literature concerning normal excretion of A13+ by the urine is summarized in Table 2. Since contamination gives higher values, the lower values shown in the table are probably more correct. Therefore, normal urinary excretion can be assumed to be 20 to 50R,g/day. If this is also accepted as a measure of the intestinal absorption and the daily intake is supposed to be 20mg, then the normal uptake fraction would be about 0.1 to 0.3%.
Table 2:
Screenshot from 2019-12-16 17-23-41.png

Using these updated parameters we found that the body burden of aluminum from vaccines and diet throughout an infant's first year of life is significantly less than the corresponding safe body burden of aluminum modeled using the regulatory MRL. We conclude that episodic exposures to vaccines that contain aluminum adjuvant continue to be extremely low risk to infants and that the benefits of using vaccines containing aluminum adjuvant outweigh any theoretical concerns.

This is the response to Mitkus by VaccinePapers.

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The Mitkus analysis is a reasonable way to estimate the toxicity and retention of ingested water-soluble aluminum (Al3+ ions). But it cannot establish safety of low-solubility, persistent aluminum adjuvant particles. More on this below.
VaccinePapers criticizes the 26 mg/kg/day NOAEL (safe dosage)

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Alawdi et al., 2016
Dosage: 3.4 mg/kg/day Al (from 17mg/kg/day AlCl3)
Dosing duration: 6 weeks
Form: AlCl3
Animal: Adult rats
Full paper: Neuroprotective Effect of Nanodiamond in Alzheimer’s Disease Rat Model: a Pivotal Role for Modulating NF-κB and STAT3 Signaling.

The 3.4 mg/Kg/day dosage is far lower than the 26 mg/Kg/day NOAEL that is the foundation for the Mitkus analysis. The NOAEL used by Mitkus is therefore wrong by a factor of at least 26/3.4 = 7.6.

Alawdi et al performed many behavioral tests and measurements of neurodegeneration and brain inflammation. Alawdi also tested the effects of nanodiamond particles (ND) and memantine (MEM, a drug for alzhiemers disease) on aluminum toxicity. The ND and MEM results are not relevant to the present discussion. However, the MEM results are interesting because they show that aluminum likely produces toxicity via an effect on NMDA receptors (since MEM interacts with NMDA receptors), such as excitotoxicity. The effectiveness of MEM indicates that aluminum causes excitotoxicity. Excitotoxicity occurs in autism.

Alawdi also showed that aluminum caused a 4X increase of IL-6 in the brain. This is an important finding because IL-6 causes autism. The 3.4 mg/Kg/day dosage is relevant to vaccines. The CDC vaccine schedule produces aluminum exposure comparable to or higher than the 3.4 mg/Kg/day dosage.

...

Borai et al., 2017 (NEW!)
Dosage: 3.4 mg/kg/day Al (from 17mg/kg/day AlCl3)
Dosing duration: 4 weeks
Form: AlCl3
Animal: Adult rats (12-15 weeks)
Full paper: Therapeutic impact of grape leaves polyphenols on certain biochemical and neurological markers in AlCl3-induced Alzheimer’s disease

This is a second study showing adverse effects from 3.4 mg/kg/day ingested aluminum. Adverse effects included decrease in acetylcholine, behavioral changes, increases in inflammatory markers, damage to purkinje cells and cerebellum, and increase in oxidative DNA damage. Note that missing purkinje cells and cerebellum damage are a consistent (essentially universal) findings in human autism.
 
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VaccinePapers acknowledges the role of Immune Activation during pregnancy, and that Autism occurs without vaccines. In addition to pregnancy immune activation VaccinePapers argues that autism can occur postnatally citing these cases.
It is worth noting that vaccines can prevent infections capable of causing inflammation that these case studies suggest can contribute to an infant's autism progression. However, autism is understood as a disease with complex causes that have a strong genetic component and these case studies are small sample sizes.
This checks out. Here is a more up to date paper finding similar absorption rates. https://www.sciencedirect.com/science/article/pii/S0162013497100149 However, an infant's gut is immature and thus more permeable to things like aluminum and antibodies from the mother. It is important to consider that they are absorbing more than 0.3% of the aluminum consumed from sources like breast milk and formula. This will be relevant to the next point as well.
VaccinePapers criticizes the 26 mg/kg/day NOAEL (safe dosage)
These criticisms are not convincing. First, their complaint that AlCl3 was used by Mitkus et al. doesn't make much sense. AlCl3 is most readily taken up into the bloodstream when ingested, thus it is relevant to establishing a safe daily dose. Its neurotoxic effects are also well characterized. Second, the demand that toxicity studies should be done using injected aluminum adjuvants has already been met. The below source is used by Vaccine Papers to claim that none of the aluminum in adjuvants is excreted in the urine following vaccination. However, they fail to mention that the researchers also found no significant rise in serum aluminum following vaccination, either. https://jamanetwork.com/journals/jamapediatrics/fullarticle/1712578
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We were reassured to find no significant postvaccine rise in serum aluminum level after vaccination of preterm infants with vaccines containing a total of 1200 µg of aluminum. The average study infant weighed 2200 g at vaccination and thus received about 545 µg/kg of intramuscular aluminum.
Last, the papers used to claim that the safe daily dose should be 3.4mg/kg are flawed. They all use mice and rats as model organisms, whereas Mitkus et al. used humans. Note that these studies also used AlCl3 as their source of aluminum. If you accept the 3.4mg/kg aluminum consumed per day experiments at face value, then you must accept that the 0.3% absorbed in the gut is what causes the toxicity. If that were true for humans, then just 0.01mg/kg per day is all that would be needed to cause toxicity, making our daily intake of aluminum through diet (11.5mg per day) would be toxic and we would all experience symptoms. That is obviously not true. This is why the Mitkus et al. data is more informative; it uses humans as the model and injection as the route of administration. Results from studies using mice or rats as the model and oral as the route of administration will not be as useful if we want to know how humans respond to aluminum.
 
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VaccinePapers acknowledges...

This is the response to Dr Offit by VaccinePapers...
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Just for perspective, the anonymous site that calls itself "VaccinePapers" refuses all peer review
and their starting assumption is:
"...medical science is the most corrupt of the sciences. It is extremely corrupt."

Of course, that doesn't mean that any specific claim of theirs is false...or true.
But their starting point might affect how much time one wanted to invest...
http://vaccinepapers.org/about/
 
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