Fayrusyada waxay gaadhi karaan sambabada iyada oo loo marayo waddooyin kala duwan. Fayrusyada neefsashada ee neefsashada waxaa caadi ahaan la qaadaa marka dadku taabtaan walxaha wasakhaysan ka dibna waxay taabtaan indhahooda ama sanka. Cudurrada kale ee fayraska ah waxay dhacaan marka dhibcaha hawada ee wasakhaysan ay neefsadaan afka ama sanka. Marka ay maraan hawo sare, fayrusyada waxay gali karaan sambabada, halkaas oo ay ku soo duulaan unugyada huwan hawooyinka, alveoli, ama parenchyma sambabada. Fayrusyada qaarkood sida jadeecada iyo herpes simplex waxay ku gaari karaan sambabada dhiigga.
indhaha ama sanka