Infected nervous tissue or salivary gland tissue is the best source of the virus . 感染的神經(jīng)組織或涎腺組織是病毒的最好來(lái)源。
Working with world health organization and centre for disease control and prevention to trace the source of the virus and ascertain the mode of transmission 與世界?生組織及疾病控制及預(yù)防中心合作,追查病毒來(lái)源及確定傳播途徑;