About two weeks after entering the body, the virus starts infecting immune cells themselves - specifically T cells - and that is considered the secondary viremia.

大概后，开始侵犯免疫细胞，特别是T细胞，这就是第二血症。

The virus now causes primary infection called varicella or chickenpox, and it has two stages - primary viremia and secondary viremia.

这时候引起初感染叫水痘，有第一血症与第二血症2个阶段。

In primary viremia the virus infects a part of immune system in the liver and spleen, called the reticuloendothelial system, which is made of phagocytic cells.

第一血症中，入侵肝脾部分免疫系统，即由巨噬细胞组成网状内皮系统。

Birds act as a reservoir for the virus, meaning the virus can replicate at high enough levels to cause significant viremia, or elevated viral blood counts, which allows for transmission to other uninfected mosquitoes.

鸟类是此宿主，意味着可在其体内以较高水平复制，以至于导致血症，继而传播给其它未受感染蚊子。

We also believe that long-term inflammation, as long-term low viremia from the SARS virus, could lead to cardiac long COVID.

我们还认为，长期炎症，如同SARS引起长期低水平血症一样，可能导致心脏长期新冠症状。

I think the leg must be getting septic.

我觉得他腿引发了脓血症。