Inmune Sistem

The immune response is the ability to provide protection to the body against harmful agents and pathogens and involves two fundamental lines of defense: innate immunity and adaptive immunity. 

Innate immunity is the first immune mechanism to fight an intruding pathogen. It is a rapid immune response, initiated within minutes or hours after the attack, which has no immunological memory. Adaptive immunity, on the other hand, is antigen-dependent and antigen-specific; it has memory capacity, which allows the host to mount a faster and more efficient immune response to subsequent antigen exposure.