noun, noun or participle which takes 'suru', intransitive verb
infection; contagion; becoming infected
Medical term for contracting a disease or pathogen. Used with する to mean 'become infected' or 'contract an infection'.
ウイルスに感染しないように手をよく洗ってください。
Please wash your hands thoroughly to avoid getting infected with the virus.
傷口から細菌が感染した。
Bacteria entered through the wound and caused an infection.
noun, noun or participle which takes 'suru', intransitive verb
being influenced (by harmful ideas); being infected (with an ideology)
Figurative extension: being influenced or 'infected' by dangerous thoughts, trends, or emotions. Often used with ～に感染する.
彼は過激な思想に感染してしまった。
He became infected with radical ideas.
その熱意が周りの人にも感染した。
That enthusiasm spread to the people around him.