A bacterium, virus, or other microorganism that can cause disease.

a protein made in response to a specific antigen that can attach to the antigen and cause it to be useless

An individual does not produce his or her own antibodies, but rather receives them directly from another source, such as mother to infant through breast milk

An unhealthy sickness condition or malfunction

a mild to severe respiratory illness that is caused by a coronavirus (Severe acute respiratory syndrome coronavirus 2 of the genus Beta coronavirus), is transmitted chiefly by contact with infectious material (such as respiratory droplets) or with objects or surfaces contaminated by the causative virus, and is characterized especially by fever, cough, and shortness of breath

Virus that destroys the immune system that should protect the body from diseases. The disease is passed from person to person through sexual acts, blood transfusions, used hypodermic needles, or from mother to child during birth.

Immune functions directed against identifiable bacteria, viruses, fungi, or other infectious agents

Overly strong reaction of the immune system to a foreign substance

A harmless variant or derivative of a pathogen that stimulates a host's immune system to mount defenses against the pathogen

Cells created in the thymus that produce substances that attack infected cells in the body.

A form of acquired immunity in which the body produces its own antibodies against disease-causing antigens

Complex molecule that is foreign to your body

nonspecific defense reaction to tissue damage caused by injury or infection

fights infection

The general ways that we prevent foreign materials from causing harm to us

exposure to foreign antigens; slow onset vs preformed antibodies from another host , rapid onset,