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jay asked in Science & MathematicsBiology · 1 decade ago

Passive immunity can be obtained by?

a. having the disease.

b. receiving a vaccination against the disease.

c. receiving antibodies by injection.

d. receiving antibodies from the mother at birth.

e. either receiving antibodies by injection or receiving antibodies from the mother at birth.

3 Answers

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  • 1 decade ago
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    Active Immunity = Immunity conferred by an encounter with the actual virus or bacterium. The body actually produces antibodies in its own defense.

    Passive Immunity = Temporary acquired antibodies passed on to the organism. No antigen is passed on.

    Choices: c,d,and e are correct

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  • 1 decade ago

    Passive immunity involves the transfer of antibodies into a blood system, without them being manufactured through an encounter with the antigen.

    So, both (d) or (e) are means through with passive immunity can be reached.

    Just a bit of interesting trivia: horses are purposely infected with snake venom, and their antiodies that emerge from encountering this antigen (venom) are purified. These purified antibodies are the active ingredient in snake antivenom, and allow the venom to be quickly cleared from the blood stream. The alternative involves waiting 2 or 3 days before your immune system genereates antibodies against the anitgen. There is a problem with this system: humans can generate an immune response against horse antibodies, so that antivenoms can only be used once in a person's life.

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  • 1 decade ago

    Passive immunity results from acquiring someone elses antibodies, rather than making your own antibodies. If you have a disease or get a vaccination - you are making antibodies yourself. However, if you get them by injection or in milk, they are passively acquired.

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