On billion zillion
Autism is NOT a disease. Many diseases do not show symptoms until later in life and as such it is impossible to say how many children are born with diseases. Furthermore it depends on the diseases, the country or location, and the time span of births.
none
20,938
For the same reason so many adults have autism, also for the same reason so many children and adults are neurotypical - it's just how we're born. This question is like asking 'why are so many children black?'.
Of course they can. Children with Autism can reach whatever career they choose. Temple Grandin is a very famous person with Autism, and she has written many great books about Autism.
Sometimes - each case is different. Many children with autism spectrum disorders tend to have digestive problems. Your pediatrician can check your children and advise you on the best dietary direction.
The CDC estimates that one in every one hundred and ten (1/110) children have an autism spectrum disorder and many believe this number is growing. Autism varies in severity.
There are many different types of psychological tests that are done on children when testing them for autism. One of the more common ones is a behavioral assessment.
The exact same percent as children that have been vaccinated. There is absolutely no link what-so-ever between vaccinations and Autism, a child is born Autistic and vaccinations cannot time-travel to change the childs development in the womb or change it's parents genes.
100-800
It's absolutely impossible to know how many cases of Autism there were in 1942. This is because Autism as a diagnosis didn't exist at that time, thus essentially Autism didn't exist, Autistic people would have been misdiagnosed as any number of other conditions.
The current figure for Autism diagnosis is 1 in 55 children. Obviously this figure could be incorrect due to a number of factors, including under-diagnosis in minority groups and girls.