0 caused by a virus -- 病毒病，病毒性疾病；病毒感染
viral infections 病毒感染
1 used to describe something that quickly becomes very popular or well known by being published on the internet or sent from person to person by email, phone, etc. -- （通過網路在個體之間迅速）病毒式的（傳播）
On the topic of vaccines and anti-virals, it is indeed true that there are concerns.
All 31 cases provided acute sera, 19 provided convalescent sera and 14 had viral throat/nose swabs taken.
All submitted samples were taken from children (age range 16 days to 7 years, median 9 months) suffering acute diarrhoea of unknown viral aetiology.
Identification of interferon gamma, the lymphokine that activates human macrophage oxidative metabolism and anti-viral activity.
Viral agents of gastroenteritis can be excreted in low numbers, and electron microscopy may not be a sufficiently sensitive detection technique.
Clearly then, in bats the subtle timing of viral dissemination must differ from the classical carnivore story.
The viral genomic sequences are related, but are very diverse, reflecting their geographic isolation.
The viral titres were averaged for all mice tested.
