News Coronavirus: What is herd immunity and how will it help protect us from Covid-19? -- -- With Boris Johnson's government stepping up the UK's response to the coronavirus pandemic to the delay phase, the term 'herd immunity' is likely to become more common -- -- Invalid Email Herd immunity is a phrase that is likely to be discussed more widely in the coming days and weeks. -- -- But it’s also expected that during this period, we’ll hear the term ‘herd immunity’ on a more regular basis. So what does it mean? -- What is herd immunity? The government is expected to increase the UKʼs coronavirus response -- -- keep away Herd immunity is when a large number of people have become immune to an infection. This is achieved by our bodies developing enough antibodies to fight a disease.