A large scale scientific study would be an excellent way to answer this question. Unfortunately, the government has refused to fund any such study. That's why the National Vaccine Information Center will be doing one, but it will be a long time before the results are in.
"We are not going to wait any longer for government or industry to answer the big question of whether the nearly 70 doses of 16 vaccines that doctors now give our children between the day of birth and age 18 is contributing to the unexplained chronic disease and disability epidemic that is harming far too many of our children. With 1 child in 6 now learning disabled; 1 in 9 asthmatic; 1 in 100 developing autism; 1 in 450 diabetic and millions more suffering with seizures, rheumatoid arthritis, Crohn’s disease, bi-polar disorder and other chronic illness, the National Vaccine Information Center is assembling a group of independent experts from multiple scientific disciplines to immediately evaluate and act to protect our children’s health.
NVIC’s Children’s Fund for Hope, Health and Healing will raise funds to first create data collection systems and conduct small preliminary studies with a longer term goal of conducting a large 10-year clinical study. The scientific research program will evaluate health outcomes of vaccinated and unvaccinated individuals; identify potential high risk factors for adverse responses to vaccination; and investigate the biological mechanisms for vaccine injury and death."