本文详细研究了具有急性阶段与慢性阶段且在慢性病阶段可再次发病的几个传染病模型。
This paper studies in detail several epidemic models with acute and chronic stages for which the diseases may recrudesce at chronic stages.
建立慢性病阶段可再次发病的传染病模型的主要目的是研究当慢性病可再次发病时对疾病传播的影响。
Therefore active treatment of the infectives at chronic stages so as to prevent the disease recrudesce is an effective measure for the control of the epidemic transmission.
而且，妇女再次受到最严重影响，发病率高于男子。
And again, women are worst affected, with a higher rate of incidence than men.
第1、4代经卵带毒虫，还能分别引起早、晚稻再次侵染。以早栽双季晚稻和杂交晚稻发病最重，其主要感染期是在本田初期。
The transovarial virus in 1st and 4th generations of congenital viruliferous insects can cause the second infection on early and late rice respectively.
结果：脑疝占6 6 .7% ，为首要死因，再次出血为次要死因，多脏器功能衰竭在发病一周后易出现，肺炎所致呼吸衰竭、心源性休克也是部分脑出血的死亡原因。
Results Cerebral herniation is 66.7%, it is the first important fatal cause. Recurrent cerebral haemorrhage is the secondary fatal cause, Multiple Organ Failure often emerges after one week.
结果：脑疝占6 6 .7% ，为首要死因，再次出血为次要死因，多脏器功能衰竭在发病一周后易出现，肺炎所致呼吸衰竭、心源性休克也是部分脑出血的死亡原因。
Results Cerebral herniation is 66.7%, it is the first important fatal cause. Recurrent cerebral haemorrhage is the secondary fatal cause, Multiple Organ Failure often emerges after one week.
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