Journals on Biomedical Science - BJSTR Journal

Abstract

In this mini-review herd immunity is discussed by reviewing some recent vaccination campaigns for HPV, MEN-C, MEN-W and #Ebola. It is concluded that vaccination coverage is rapidly declining due to societal factors, financial and logistical hurdles. Herd immunity depends now on unpredictable herd effects, Secondary declining transmission dynamics and carriage figures favour strong herd effects. Different target populations in the MEN-W vaccination programs of the UK and the Netherlands don't improve public confidence in an #anti-vaxxers climate. Herd immunity is not a realistic target anymore and is dependent on herd effects varying with vaccination coverage percentages and this should be explained to the public in a clear way. The term "#herd immunity" was introduced a century ago and used widely after increasing use of vaccines and vaccination protocols in the process of eradication of #diseases [1]. The definition of herd immunity varies by several authors. Some use it to describe the proportion immune among individuals in a population, others use it with reference to a particular threshold proportion of immune individuals that should lead to a decline in incidence of #infection and still others use it to refer to a pattern of immunity that should protect a population from an invasion of a new infection [2].

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Herd Immunity: A Realistic Target? by Michael AB Naafs in BJSTR