Covid: Why has the Delta variant spread so quickly in UK?

Where is the Delta variant?
Labs around the world that analyse the virus’s genetic material have been sharing their findings to a global database. When you look at this, the UK looks like it has more cases of the Delta variant than most of the rest of the world.
For example, there were 875 Delta cases identified in India in the week beginning 3 May, when the virus was raging, and just 142 in the past four weeks. That’s despite the country recording between half a million and two million new cases a week since the start of May, with Delta believed to be the dominant variant.


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