epidemic; outbreak of disease
Refers to the spread of an illness within a population. Used in medical, news, and everyday contexts.
An influenza epidemic is a concern this winter.
保健所は病気の流行を防ぐために注意を呼びかけた。
The public health center urged caution to prevent an outbreak of disease.
Compound of 病気 (disease) + の (possessive particle) + 流行 (spread, prevalence).