noun
morbidity rate; disease rate; infection rate
Technical term used in epidemiology and public health. Often compared with 罹患率 (attack rate).
See also: 罹患率
この地域の罹病率は年々低下している。
The morbidity rate in this region has been declining year by year.
Compound of 罹病 (ribyō, 'contracting a disease') and 率 (ritsu, 'rate').