Question

Why the virus are infecting us

Answer 1

Viruses lie around our environment all of the time just waiting for a host cell to come along. They can enter us through the nose, mouth or breaks in the skin (see How the Immune System Works for details). Once inside, they find a host cell to infect. For example, cold and flu viruses will attack cells that line the respiratory or digestive tracts. The human immunodeficiency virus (HIV), which causes AIDS, attacks the T - cells of the immune system.

Answer 2

Viruses are the diseases that are spreading from one people to another.Like HIV,AIDS.For example,Cold spread from one people to another.

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