noun
asymptomatic person; person without symptoms
Primarily used in medical and public health contexts for someone infected but not showing symptoms.
無症状者でもウイルスを広げる可能性がある。
Even asymptomatic people can spread the virus.
Compound of 無 (mu, 'without'), 症状 (shōjō, 'symptom'), and 者 (sha, 'person').