Epidemiological investigation and analysis on the outbreaks of the diseases induced by influenza b virus 由维多利亚系乙型流感病毒引起的流感暴发疫情流行病学调查分析
Antigenic and genetic characterizations of victoria like strain of influenza b viruses isolated in china in 2001年中国新分离维多利亚系乙型流感病毒的抗原性及基因特性分析
Three types of influenza viruses are recognized : a , b and c . infection caused by influenza a viruses is more common 流感病毒共分甲乙丙型三种，由甲型流感病毒引起的感染较为常见。
Avian influenza ( ai ) was caused by avian influenza virus ( aiv ) , which was first reported in 1878 in italy 禽流感( avianinfluenza ， ai )是由a型流感病毒引起的一种禽传染病，于1878年首次在意大利暴发流行。
Ideally , the vaccine incorporates antigens of the a and b influenza strains that will be prevalent in the community during the upcoming winter 理想的疫苗需包括来年冬天在社区流行的a和b型流感病毒株的抗原。
Certain etiologic agents such as viruses are more likely to lead to chronic inflammation , as seen here in the lung of a patient with influenza a 某些病因比如病毒多导致慢性炎症，如图甲型流感病毒感染者肺。
Although dramatic variation occurs frequently in genome of type a influenza virus , the np gene is comparatively conservative representing virus type specificity 虽然a型流感病毒变异频繁，但其核蛋白（ np ）是其保守性蛋白，具有种群和型的特异性。
