noun which may take the genitive case particle 'no'
asymptomatic; subclinical; without symptoms
Medical term describing a condition or infection that shows no noticeable symptoms. Often used attributively with の.
See also: 無症状
無症候の感染者もウイルスを広げることがある。
Asymptomatic carriers can also spread the virus.
この病気は無症候のまま進行することがある。
This disease can progress while remaining asymptomatic.
Compound of 無 (without) + 症候 (symptoms, signs of illness).