The role of these asymptomatic carriers in transmission is not yet fully known, however preliminary evidence suggests that they may contribute to the spread of the disease.
Jukumu la waenezaji hawa wasioonyesha dalili katika maambukizo bado halijulikani kabisa, hata hivyo, ushahidi wa awali unaonyesha kuwa wanaweza kuchangia kwa usambazaji wa ugonjwa.