inapparent infection; subclinical infection
Medical term for an infection that produces no noticeable symptoms. Often contrasted with 顕性感染 (overt/symptomatic infection).
Antonyms: 顕性感染
不顕性感染の人は、症状がなくてもウイルスを広げることがある。
People with inapparent infections can spread the virus even without symptoms.
Because this disease often causes subclinical infections, the actual number of cases is thought to be higher than reported.