Name the type of immunity that is present at the time of birth in humans. Explain any two ways be which it is accomplished .

Explanation

Innate Immunity is present at the time of birth. Innate immunity consists of four types of barriers :
`{:("1. Physical barriers., 2. Physiological barriers." ),( "3. Cellular barriers. 4. Cytokine berriers." ):}`
2. Cellular barriers-Certain types of leukocytes (WBC) of our body like polymorphonuclear leukocytes (PMNL-Neutrophils) and monocytes and natural killer in the blood as well as Macrophages in tissues can Phagocytose and destroy microbes.
Cytokine berriers-Virus infected cells secrete proteins called interferon which protect non-infected cells from further viral infection.