Objective:To construct a recombinant defective retroviral vector carrying hNT3 gene and a stable virus-producing packaging cell lines , and then to identify them.

构建并鉴定携带人NT - 3基因的逆转录病毒载体以及稳定的包装细胞系。

youdao

"because the virus can spread rapidly, but what we're seeing so far is a pretty stable position as far as the virus is concerned, it's producing relatively mild illness in most people, but in a small proportion it's causing serious problems and we have in place the plans in our health care system to deal with those problems,".

VOA: standard.2009.07.31

But the virus is not stable and since we started the cleanup process, three new versions of it have been spreading.

CENTERFORSECURITYPOLICY: The strategic lessons of Stuxnet

As of Monday, two people with the virus remained hospitalized in stable condition, said WHO.

CNN: STORY HIGHLIGHTS