noun, noun or participle which takes 'suru', intransitive verb
reinfection
Medical term for becoming infected again with the same pathogen after recovery. Can be used as a noun or as a suru-verb (intransitive).
再感染を防ぐために、手洗いを徹底してください。
To prevent reinfection, please wash your hands thoroughly.
一度治ったのに
Even though I had recovered once, I got reinfected with the same virus.