One of the most comprehensive studies is an ongoing comparative survey by German homeopathic physician Andreas Bachmair. Bachmair is conducting an independent study comparing the health of vaccinated to unvaccinated children with 17,461 participants.
This research has found a significant increase in the following diseases in those vaccinated: asthma, allergies, bronchitis, otitis media (ear infections), hay fever, herpes, neurodermatitis, hyperactivity, scoliosis, epilepsy, autoimmune disorders, thyroid disease, autism and diabetes. Furthermore, Bachmair discovered three other studies which substantiated his findings. To see the chart with the comparison in diseases, visit this link provided by the Vermont Coalition for Vaccine Choice.
For comprehensive survey results for this published study, see this link.
The majority of those who participated were Americans, with 25 percent of participants comprised of Germans. Ninety-nine percent of those who chose not to vaccinate their children reported to be happy with their decision. Because this study is ongoing, study numbers will vary depending on the report viewed. 
Bachmair’s reports further demonstrated that the unvaccinated children very rarely suffered from the following heath conditions: dyslexia, speech delays, bed wetting, celiac disease, gluten sensitivity, GERDs. 
In a Salzberger study, of 1,004 unvaccinated children, zero children had asthma, compared to 8-12 percent of the vaccinated population; 1.2 percent of unvaccinated children suffered with dermatitis while 10-20 percent of children vaccinated experienced dermatitis; and less than one percent of unvaccinated children were diagnosed with ADHD, compared to 5-10 percent of those vaccinated.
A study in Guinea-Bissau, West Africa, which studied the children of 15,000 mothers between 1990-1996, demonstrated that the death rate for children vaccinated against diphtheria, tetanus and whooping cough was double for those who had been vaccinated.
A New Zealand study involved 254 children in which 133 children were vaccinated while 121 remained unvaccinated. This comparative study found that the unvaccinated children enjoyed far superior health when the following diseases were studied: tonsillitis, asthma, allergic rashes, SIDS, ear infections and hyperactivity.
Vaccinated children experienced 2 to 10 times higher rates of illness compared to those vaccinated. 
In the Amish community of Lancaster County, Pennsylvania, one in 4,875 children were diagnosed with autism. Of the four total Amish children diagnosed, one had been exposed to high levels of mercury from a power plant and three others, including one adopted outside of the community, had been vaccinated. This rate is extremely low to non-existent compared to those vaccinated. Similarly, the Amish of Ohio show that one out of 10,000 children are diagnosed with autism. In the general US population, one in 45 children is now being diagnosed with autism. [4, 5]
In a Homefirst Health Services survey in which 90 percent of children have had no vaccinations, none of the 35,000 children had an autism diagnosis. Furthermore, these children had extremely low asthma rates.
In a Cal-Oregon survey of 9,000 boys, those children vaccinated experienced a 155 percent greater chance of having a neurological disorder such as autism or ADHD.
In Sally Fallon’s Nourishing Tradition’s Book of Baby and Childcare, five studies are reported, including the Africa and German study previously discussed. The studies all conclude that unvaccinated children enjoy better health than those who have been vaccinated.
A 2004 British study of 8,000 unvaccinated children, which included medical documentation for each child, revealed that vaccinated children experienced two to five times more illness and disorders compared to unvaccinated children. 
In a 1997 New Zealand study, 1265 children were surveyed. Of those children who were vaccinated, 23 percent were reported to suffer from asthma and 30 percent suffered from allergies, compared to none in the vaccinated group. 
A 1992 New Zealand study of 495 children concluded that vaccinated children suffer far more compared to unvaccinated children. Diseases studied included tonsillitis, ear infections, sleep apnea, hyperactivity and epilepsy. Vaccinated children suffered up to ten times more from these illnesses. 
While government groups maintain that no studies have been done to compare the health of vaccinated to unvaccinated, the reality is that several comparative studies have been completed by independent researchers in the US and in other countries.
The Centers for Disease Control and Prevention refuses to conduct such studies, claiming they would be unethical to perform. In reality, these studies could easily be performed, since many educated parents choose to not vaccinate their children.
The evidence is overwhelming. Studies completed in New Zealand, Germany, Africa, Great Britain and the United States have come to the same conclusion. Unvaccinated children enjoy far superior health on all measures of disease entities.
Michelle Goldstein is a mental health therapist who is passionate about holistic health, natural healing, nutrient-dense foods and the politics that impact them. She has published articles for Natural News, VacTruth – where this article first appeared, and other health websites. All of her published articles to date can be found at her health website, Holistic Health to Go. She can also be followed on her Facebook Page, Holistic Health to Go.