(CNN) -- The retraction of a controversial study that suggested a link between autism and a childhood vaccine has been little comfort to Joe Dimino.
Dimino, whose 5-year-old son has a type of autism, said it only made him more disillusioned with the medical establishment. While Dimino does not believe vaccines cause autism, he's not entirely convinced the shots are harmless.
The now-discredited study published in the Lancet in 1998 raised the possibility of a link between autism and the measles, mumps and rubella vaccine. The study had become a rallying point for many parents questioning the safety of childhood vaccinations.
"We feel like we're getting yanked around with this information -- how can you say something and say sorry 12 years later?" said Dimino, of Belton, Missouri. "That's the way it feels."
It left him feeling "more mistrustful of both 'communities,'" he wrote in his iReport.
Even without the vaccine-autism controversy, parents of children with autism live with a constant question that no scientist or doctor has been able to answer: Why?