Tek 4C

By: Tanya Raghu

What does the immune system do to prevent viruses?

White Blood Cells

The body's defense against foreign invaders and viruses is the immune system. It is made of a network of cells, tissues, and organs which work together, the main cells involved are Leukocytes (white blood cells) which look to destroy viruses. The cells are found all over the body including in the bone marrow, thymus, and spleen.

When Viruses are detected, several different types of cells work together to kill these foreign predators. Lymphocytes are triggered start to produce antibodies, specialized proteins that detect the viruses.

Once produced, these antibodies continue to exist in a person's body, so that if the same antigen is presented to the immune system again, they can attack again.

Chicken Pox

The reason why people only get infected with Chicken Pox one time is because the first time these antibodies were already created for the infection and continue to exist to ward off the disease.

Passive Immunity

Passive immunity is "borrowed" from another source and it lasts for a short time. For example, antibodies in a mother's breast milk provide a baby with temporary immunity to diseases the mother has been exposed to. This can help protect the baby against infection during the early years of childhood.