Yes, a history of childhood illness or medical trauma can influence the development of Mysophobia. Experiences of prolonged illness, hospitalization, or medical procedures during childhood can create associations between germs, contamination, and negative experiences, leading to the development of Mysophobia. Addressing these past traumas through therapy, particularly trauma-focused approaches, can help individuals process the experiences, reduce anxiety, and untangle the influence of childhood illness or medical trauma on their Mysophobia.