I'm unsure what you mean by “negative effects,” but the Mawson et al. study found that, compared to the group of unvaccinated 6-12-year-olds, the vaccinated group of children had lower ratios of chickenpox, whooping cough and rubella, but higher ratios of otitis media (ear infection), pneumonia, allergies, allergic rhinitis (hay fever), ADHD, Autistic Spectrum Disorders, eczema, Learning Disability, other chronic conditions, use of allergy drugs, use of antibiotics in the past year, use of fever medications 1+ times, use of ear drainage tubes, one or more emergency room visits in the past year, sick visits to doctor, and to have ever spent a night in the hospital. Which group had you rather be in? Which group would you rather your child to be in?I'm not going to be able to dissect all that technical information, but my initial thought would be the negative effects of vaccination on a population are much less than an unvaccinated population experiencing outbreaks of the diseases they have been vaccinated against.
The thing is, as the authors suggest, unless and except for any diseases that are an unavoidable and inherent consequence of a vaccine (which is apparently the case for otitis media, and possibly others) or the vaccination schedule, there is really no need for one to be given such a Hobson's choice as to be in one of the above groups or the other. There is no reason, as far as I know, that vaccines themselves should result in higher rates of neurodevelopmental disorders. There is every reason to suspect that the higher rate of NDDs among the vaccinated group is due to exposing fetuses, infants and children to ethylmercury and aluminum.