PATHOLOGY

Detailed explanation-1: -Passive immunity provides immediate protection, but the body does not develop memory; therefore, the patient is at risk of being infected by the same pathogen later.

Detailed explanation-2: -Rapid and blunt, the innate immune system is the first line of defense. It recognizes a limited number of molecular patterns in disease-causing microbes, or pathogens. Convention says that the innate immune system retains no memory of previous infections.

Detailed explanation-3: -Active immunity involves the production of antibodies by the body itself and the subsequent development of memory cells. Passive immunity results from the acquisition of antibodies from another source and hence memory cells are not developed.

Detailed explanation-4: -Passive Immunity. Passive immunity is provided when a person is given antibodies to a disease rather than producing them through his or her own immune system. A newborn baby acquires passive immunity from its mother through the placenta.