Autism affects about 21.7 million people in the world. 1 out of 42 boys and 1 in 189 girls are diagnosed with autism in the U.S. Boys are nearly five times more likely than girls to have autism. The doctor who claimed a link between vaccines and autism, Andrew Wakefield, created fraudulent data for his paper and lost his medical license as a result. Over 20% of the U.S. population still believe that vaccines cause autism. The 'intense world theory of autism' suggests that autistic people shut down because they experience and feel too much. People with autism are less likely to catch yawns. The more severe their condition, the less common the behavior gets. There are virtually no differences in brain anatomy between people with autism and those without. Low vitamin D levels during pregnancy have been linked to autism. Over 250 cinemas in the UK have Autism Friendly Screenings (AFS) in which the volume is lower, the lighting is darker and you can take your own food and drink. Although Autism is generally assumed to be lifelong, there's evidence that between 3% and 25% of affected people eventually recover, a 2008 study found. Research shows that drama classes are particularly useful for improving the social skills of autistic children. In Belgium, people with autism, bipolar disorder, depression and other mental illnesses can request to be euthanised. 90% of deaths in Autism Spectrum kids under 14 are from drowning.