مدرس المادة
Immunity = resistance
• The word immunity was derived from the Latin word “immunis” meaning exempt.
• It is the sum of all naturally occurring defense mechanisms that protect humans from infectious disease.
The immune system = collection of organs, cells and proteins that function to protect all the body from foreign antigens, such as bacteria, fungi, viruses and parasites
Two important types
I. Innate (natural) or non-specific immunity
II. Adaptive (acquired) or specific immunity
تحميل الملف