There are many studies on how many autistic people there are. In the United States, the CDC does studies. In 2018, they found that 1 in 44 children are autistic. That is about 2%. According to the World Health Organization (WHO), 1 in 100 children worldwide are diagnosed with autism. This number keeps going up. Many people wonder why there are more and more autistic children. Some people think that something is causing it. But most scientists think that we are getting better at diagnosing autism. More doctors know about autism and can diagnose children that they see. More people have access to medical care and can get a diagnosis.