Know and protect against bacteria, viruses and infection

Safe our Life from  viruses and infection....

Germs live everywhere. You can find germs (microbes) in the air; on food, plants and animals; in soil and water — on just about every other surface, including your body.

Most germs won't harm you. Your immune system protects you against infectious agents. However, some germs are formidable adversaries because they're constantly mutating to breach your immune system's defenses. Knowing how germs work can increase your chances of avoiding infection.

Infectious agents: From bacteria to worms

Infectious agents come in a variety of shapes and sizes. Categories include:

Bacteria

Viruses

Fungi

Protozoa

Helminths

Understanding infection vs. disease

There's a difference between infection and disease. Infection, often the first step, occurs when bacteria, viruses or other microbes that cause disease enter your body and begin to multiply. Disease occurs when the cells in your body are damaged — as a result of the infection — and signs and symptoms of an illness appear.

In response to infection, your immune system springs into action. An army of white blood cells, antibodies and other mechanisms goes to work to rid your body of whatever is causing the infection. For instance, in fighting off the common cold, your body might react with fever, coughing and sneezing.