There is no known cure for autism, it is a lifelong condition. It most likely has multiple causes and certainly presents itself in many different ways. It may even be the case that future research will identify different forms of autism which have different causes. My view is that trying to cure autism is a bit like trying to ‘cure’ personality! Having autism is as much a part of a person as having a personality. Half the battle is understanding and accepting each individual’s strengths & weaknesses and appreciating them for the amazing individual that they are.
Having said that, it is important to understand that people with autism do have to live in a world where the majority of people are not autistic. They will therefore need help to learn how to interact with the non-autistic world. It’s a bit like learning the language of the country you’re going on holiday to. It doesn’t stop you from being who you are but it does help you to get what you need and communicate with others when you are there. A speech and language therapist can help an autistic child ‘learn the language’ of the non-autistic world and provide strategies that help the autistic person to cope in that world.