Early Indus Valley Civilization ... their Geograhpy, their customs and Indo-Aryan civilization with the earliest caste system.
Antibodies contribute to immunity in three main ways: they can prevent pathogens from entering or damaging cells by binding to them; they can stimulate removal of a pathogen by macrophages and other cells by coating the pathogen; and they can trigger direct pathogen destruction by stimulating other immune responses such as the complement pathway.
that are specific to the antigen. These antibodies are released into your body to attach to the virus particles. These antibodies are important because the invading virus may outnumber your own immune system cells.The antibodies attach to the antigens and hold on tight.hat are specific to the antigen. These antibodies are released into your body to attach to the virus particles. These antibodies are important because the invading virus may outnumber your own immune system cells.