Abstract Abstract Immunity is the state of protection against infectious disease conferred either through an immune response generated by immunization or previous infection or by other non-immunological factors. This article reviews active and passive immunity and the differences between them: it also describes the four different commercially available vaccine types (live attenuated, killed/inactivated, subunit and toxoid): it also looks at how these different vaccines generate an adaptive immune response. ,,,, Introduction The first article of this series reviewed those host mechanisms that protect against microbial invasion. Install Printer Driver Programmatically Change. Both limited effectiveness against particular pathogens together with pathogen evasion processes mean that certain infectious diseases are still a frequent occurrence; some are occupationally related with the risk to health care workers being particularly well documented [,]. Hp Compaq Nc6400 Bluetooth Driver Free Download on this page. Auto Kaufvertrag Polnisch Deutsch Pdf Printer here. Since particular occupationally transmitted infections can be prevented by immunization, this article will look at how the different vaccine types modulate adaptive responses to provide further protection. First, however, the terms active and passive immunity will be considered.