However, there are individuals requesting that all children be vaccinated because of the children that cannot receive vaccinations, such as individuals suffering from immunodeficiency disorders and cancer. There was a frenzy related to the correlation between autism and the MMR vaccination because the symptoms of autism first appear in the same time span that children begin receiving vaccinations. However, this ‘theory’ was disproved by Mrozek-Budzyn, Kieltyka, Majewska, and Augustyniak (2014) when the study found there was no correlation between children’s cognitive development and the exposure of MMR