Is there a 'regressive phenotype' of Autism Spectrum Disorder associated with the measles-mumps-rubella vaccine? A CPEA Study.

Richler et al. (2006) asked a simple question. Do kids who lose skills after the MMR shot have a special kind of autism?

They looked at children with autism who had lost words or other skills. They checked if those kids got the MMR shot right before the loss.

They also compared the kids who lost skills with kids who did not. They wanted to see if the two groups looked different in daily life.

The team found no link between the MMR shot and skill loss. Kids who regressed did not get the shot closer to their loss than other kids.

Kids who lost skills did have lower verbal IQ and more tummy problems. Still, the shot was not the trigger.

So, regression is real, but the vaccine is not the cause.

Baird et al. (2008) counted how many kids lose language in the general autism population. They found about 30 % of narrow autism cases lose words. Jennifer’s team shows those same kids have slightly worse verbal scores, so the two studies line up.

Woo et al. (2007) looked at vaccine-safety reports. Parents sent in more reports about autism when the child had lost skills. That sounds scary, but Jane’s group warned the reports are biased. Jennifer’s clean data back up that warning.

Ben-Itzchak et al. (2020) tracked kids for many years. Higher early verbal skills predicted better teen outcomes. Jennifer’s finding of lower verbal IQ in the regressive group fits right into that long-term picture.

You can now tell families the MMR shot does not cause regressive autism. Point them to the clear data instead of scary stories. When you see a child who lost words, check verbal IQ and GI issues, but skip vaccine blame. Use the extra clues to plan language goals and medical referrals right away.