If the vaccination rate for hepatitis B virus in a given country is at 60 percent of the population, it is reasonable to conclude that

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Quizplus · Accepted Answer

Herd immunity typically requires vaccination rates above 80‒90 percent, so it is unlikely that herd immunity is in place at a vaccination rate of 60 percent. Another 10‒20 percent of the population would need to be immunized in order to effectively control or eradicate the disease. The vaccination rate alone does not guarantee that transmission to infants will cease or that older people will be unlikely to contract the disease. The cost effectiveness of further immunizations would depend on various factors beyond the vaccination rate alone.

If the Vaccination Rate for Hepatitis B Virus in a Given