auto-infection
disease arising from an infectious agent already present in the body but previously asymptomatic
en-GB/ˈɔːtəʊ - ɪnˈfɛkʃən/
en-US/ˈɔtoʊ - ˌɪnˈfɛkʃən/
disease arising from an infectious agent already present in the body but previously asymptomatic