Active & Passive Immunity Video Lecture - NEET

Ans. Active immunity refers to the immunity developed by an individual's own immune system after exposure to a disease-causing agent or through vaccination. It involves the production of antibodies and memory cells that provide long-term protection against future infections.

Ans. Passive immunity is a temporary form of immunity that is acquired from outside the body. It can be obtained naturally from the transfer of antibodies from a mother to her baby during pregnancy or breastfeeding. It can also be obtained artificially through the administration of pre-formed antibodies, such as through the use of immune globulin or antivenom.

Ans. Active immunity is acquired through the body's own immune response, either by natural exposure to a pathogen or by vaccination. It takes time to develop, but it provides long-lasting protection and the ability to generate a rapid and specific response upon re-exposure. In contrast, passive immunity is acquired from an external source and provides immediate, but short-term protection. It does not stimulate the body's immune response, and the individual does not develop memory cells.

Ans. Active immunity has several advantages over passive immunity. Firstly, active immunity provides long-lasting protection as it stimulates the body's immune response and leads to the development of memory cells. This means that the individual will have a faster and more specific immune response upon re-exposure to the same pathogen. Secondly, active immunity can be obtained through vaccination, which is a safer and more controlled method compared to the administration of pre-formed antibodies. Lastly, active immunity promotes the overall health of the immune system by strengthening its ability to recognize and fight against various pathogens.

Ans. Yes, active and passive immunity can be combined to provide enhanced protection in certain situations. For example, when an individual is at immediate risk of a severe infection or when their own immune system is compromised, passive immunity can be administered to provide immediate protection. At the same time, active immunization can be initiated to stimulate the individual's own immune response and provide long-term protection. This combination approach is often used in cases such as post-exposure prophylaxis for certain infectious diseases.