Glossary

CD4 molecule - A protein found on the surface of many immune cells.

Chronic- An illness that persists for a long time or it constantly returns.

Cirrhosis- A chronic disease in the liver that could lead to liver failure.

Co-receptor - A type of receptor, which helps other things bind to cells.

Conjunctivitis - Also known as pink eye. It is an inflammation or an infection in the eye that occurs in the outer membrane of the eyeball or in the inner eyelid.

Degeneration - The action of the state of something gradually worsening.

DNA - A double chain of nucleotides, which contain essential information about the cell, and are stored in the cell nucleus

Flu-like symptoms - These can include sore throats, coughing, runny nose, fevers, headaches, joint pains and muscle pains.

Hemagglutinin- A group of glycoproteins (class of proteins) that cause red blood cells to clump together.

Immunity - The inability to react to a virus as your immune system has beaten the virus and will fight it off immediately should it return. Vaccines help give immunity to people without them catching the disease.

Intravenous - Injected or in someone's or something's veins.

Jaundice - When your skin and the whites of the eyes have a yellowish tinge to it.

Neuraminidase- A hydrolytic enzyme that occurs on the surface influenza viruses

Pneumonia - A condition where one or both of your lungs fill up with fluid or pus. This is life threatening.

Respiratory - The system that is used for breathing, including the lungs. If an illness targets the respiratory system, people can experience coughing and other breathing problems.

RNA - A single chain of nucleotides, which carry the essential information of a cell to different cells

T cells - A type of cell which plays an important role in immune responses.

Trunk - Any living thing's body not including appendages and head. Another word is torso.