noun
self-isolation
Used especially in medical or public-health contexts for voluntarily staying apart from others to prevent disease spread.
感染拡大を防ぐため、自己隔離が求められている。
Self-isolation is being requested to prevent the spread of infection.
隔離 is a general term for isolation or quarantine, often imposed by authorities, while 自己隔離 specifically refers to voluntary self-isolation.
Compound of 自己 (self) and 隔離 (isolation). The term became widely used during the COVID-19 pandemic.