紧急翻译一段话

5 levels of - 6 levels (large-scale interpersonal dissemination) 5 levels: The identical type influenza virus in the identical area (for instance North America) two countries cause the interpersonal flu to disseminate continually at least. Although the majority countries will still not receive under this rank obviously affect, but 5 levels mean that the large-scale flu epidemic situation was approaching, the prevention epidemic situation dealt with the time not to be already many. 6 levels: The identical type influenza virus interpersonal disseminates occurs in two or two above areas. This rank means that a global epidemic situation is occurring.