What is herd immunity and can it be achieved with the Delta Covid variant?

What is herd immunity and can it be achieved with the Delta Covid variant?

The Delta variant is cause for concern (Picture: MEHDI FEDOUACH/AFP via Getty Images)
The term ‘herd immunity’ has been floating around since the Covid-19 pandemic began.
The UK adopted the strategy early on in the pandemic, before making a dramatic U-turn and locking down businesses, restaurants, and schools.
Scientists believed that the UK was getting close to reaching it – however, there are…

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