NOTE: In 1989, a second dose of MMR vaccine was recommended, which — after being implemented — led to a steep rise autism.
Reference
Genetic Aspects of Infantile Autism. S E Folstein. 1985. https://doi.org/10.1146/annurev.me.36.020185.002215
Prevalence and Characteristics of Autism Spectrum Disorder Among Children Aged 8 Years — Autism and Developmental Disabilities Monitoring Network, 11 Sites, United States, 2020. https://www.cdc.gov/mmwr/volumes/72/ss/ss7202a1.htm
