Resistance of a population to a particular infectious agent because of the immunity of a threshold percentage of the population is known as immunity.
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In biology, the terms "resistance" and "immunity" have different meanings. Resistance is a pre- existing mutation in an organism that confers protection against a threat or challenge such as a virus. "Resistance" is used in the same manner as "antibiotic-resistance" in bacteria. "Immunity" refers to an active response of the immune system to the challenge of foreign particles that confers protection upon the organism. You have investigated many forms of protections against HIV. Which of these constitute resistance and which of them constitute immunity?
Suman K.
Which term refers to the threshold where enough members of a population have developed immune memory against a pathogen that infection transmission is dramatically restricted? Escape variant Hygiene hypothesis Attenuated virus Herd immunity
Sri K.
Herd immunity only occurs in a population in which all individuals are immune. occurs in a population in which a large percentage of the population is immune. only provides protection to those that are already immune. is responsible for dramatic increases in childhood diseases. occurs in a population in which a large percentage of the population is immune AND is responsible for dramatic increases in childhood diseases.
Adi S.
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