These are similar to the behaviors listed above, except a few other things should be noted:

Development appears normal until about the age of 18 months; this often includes the rapid loss of skills that were acquired up to 18 months.
Any scientific research conducted on the co-relation between vaccines and autism has debunked the 1990s study that claimed a tie to vaccines.
The chances of having another child with autism after you’ve had one will go up exponentially.

Treatment for the above-listed symptoms can initially begin through the use of ABA therapy. Over time, as prerequisite skills for playgroups, social groups, and school development, a gradual transition toward these activities is made through a well-designed series of transition programs designed by a BCBA in collaboration with respective settings and the activities described above.

The best answer to this is the sooner the better! The best results are achieved when the child begins receiving treatment as early as 2 years of age. ABA therapy is beneficial for all ages, but its most profound effects occur with younger children between the ages of 2 and 7. Children are typically eligible for services until at least 18 years of age.