Question

Passive immunity was discovered by
A. Robert Koch
B. L. Pasteur
C. Edward Jenner
D. Eemil Von Behring

Answer 1

Hint: The ability of the body to defend itself against disease-causing organisms is known as immunity. Every day, our bodies come into contact with a variety of pathogens, but only a small percentage of these cause disease. The reason for this is that our bodies can produce antibodies against these pathogens, which protects us from disease. Immunity is the name given to this defense mechanism.

Complete answer:
Immunity refers to a multicellular organism's ability to resist harmful microorganisms. There are both specific and nonspecific components to immunity. The nonspecific components, regardless of antigenic make-up, act as barriers or eliminators for a wide range of pathogens.
 Other immune system components adapt to each new disease they encounter and can even produce pathogens. Innate and adaptive immunity are two parts of the immune system. Adaptive immunity is only found in vertebrates, while innate immunity is found in all metazoans.
Emil Adolf von Behring and Kitasato Shibasaburo discovered antitoxin-based immunity to diphtheria in 1980. Emil von Behring was the one who discovered passive immunity. Passive immunity is the transfer of immunity from one person to another in the form of ready-made antibodies.
Passive immunity can occur naturally when maternal antibodies are transferred to the fetus through the placenta, or it can be induced artificially when non-immune individuals are given high doses of human (or horse) antibodies specific for a pathogen or toxin.

As a result, option D is the correct answer.

Note:
Passive immunization is used to reduce the symptoms of ongoing or immunosuppressive diseases when there is a high risk of infection and insufficient time for the body to develop its immune response. Passive immunity provides immediate protection, but because the body lacks memory, the patient is at risk of contracting the same pathogen again later.