The nurse is explaining how maintaining high rates of immunization among children not only protects individual children from disease, but also serves to protect other members of the population. This best describes:
1. Active immunity.
2. Passive immunity.
3. Acquired immunity.
4. Herd immunity.
Answer: 4
Explanation: 4. Herd immunity is the level of protection provided to unimmunized people when immunization rates are high among the rest of the population. Active immunity is the immunity resulting from the development of antibodies within the body that neutralize or destroy the infective agent. Passive immunity is immunity acquired by the introduction of preformed antibodies into an unprotected individual. Acquired immunity is immunity resulting from the development of active or passive immunity.
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a. "That sounds nice, but I'm already in a romantic relationship with someone.". b. "The hospital has a policy that does not allow professional staff to date patients.". c. "I guess there would be no harm in meeting for coffee, if we know in advance that we're meeting just as friends.". d. "We've developed a positive working relationship, and meeting socially would have a negative impact on that relationship.".
Which of the following available contraceptives has the lowest initial rate of effectiveness?
a. Male condom b. Tubal ligation c. Female condom d. Vaginal contraceptive ring