herd immunity

Herd immunity (also called herd effect, community immunity, population immunity, or mass immunity) is a form of indirect protection that applies only to contagious diseases. It occurs when a sufficient percentage of a population has become immune to an infection, whether through previous infections or vaccination, thereby reducing the likelihood of infection for individuals who lack immunity.Once the herd immunity has been reached, disease gradually disappears from a population and may result in eradication or permanent reduction of infections to zero if achieved worldwide. Herd immunity created via vaccination has contributed to the reduction of many diseases.

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  1. NIMR yaja na utafiti kugundua ni idadi gani ya watanzania waliambukizwa virusi UVIKO19, COVID19. Safi sana

    Tanzania inakwenda kuingia kwenye medani za kisayansi kwa lile 'jaribio lake la nchi nzima la kujiachia badala ya kujifungia kipindi cha korona'. A nationwide display of herd immunity at its best. Hii itatusaidia sana kujua je ni kwa kiwango gani hii 'herd immunity' imetubeba. Na itasaidia...
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