一般来说，遗传，妊娠期感染，或低出生体重等均可能导致该病。
It is often a result of genetics, infection during pregnancy, or low birth weight.
因为其指定的神经氨酸酶遗传密码——H 1 N 1中的N1——控制着被感染细胞的病毒扩散。
It codes for the neuraminidase enzyme - the N1 in H1N1 - which controls the expansion of the virus from infected cells.
老年痴呆症的病因有很多，但是Itzhaki博士估计，遗传因素和这种病毒的感染可能占到所有病因的60%。
Alzheimer's has many causes, but Dr Itzhaki estimates that genetics and this virus taken together may account for up to 60% of the explanation.
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