Virus mainly affects the human respiratory tract. It can replicate in airway epithelial cells and endothelial cells, damage lung tissue, and destroy gas exchange barrier.

病毒主要侵犯人类呼吸道，一方面在呼吸道上皮细胞和血管内皮细胞内复制，损伤肺组织，破坏气体交换屏障；

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It's a question not only of spam and virus control, but archiving all e-mails as required by Securities and Exchange Commission law.

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Schrader said an estimated 20 million Exchange seats and 30 million Lotus Notes mail systems are vulnerable to the virus or its variants.

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