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delta mutation sweeping across the world, including Korea, is breaking down the Corona virus response methods created by mankind so far one by one. It was thought that if more than a few percent of the people were vaccinated, they would develop herd immunity and drive out the corona, but the reality was different.



Reporter Kim Young-ah will tell you about this.



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UK has the highest rate of vaccination against coronavirus in the world.



[Sajid Javid/British Health Minister: Today we achieve a significant milestone, with 75% of adults getting two doses.]



If you include those who have had their first dose, the coverage rate is as high as 90% of adults.



[Sajid Javid/British Health Minister: Vaccination will help us get back to normal life in a pandemic situation.]



However, today (11th), there were more than 23,000 new cases and 146 deaths. The highest number in the last five months.



Professor Andrew Pollard of Oxford University, who led the AstraZeneca vaccine clinical trial, asserted that herd immunity is just a 'myth'.



A recent study found that the spread of the delta mutation is only 50% effective in preventing infection even in people who have been vaccinated twice.



[Andrew Pollard/Professor, University of Oxford, UK: Herd immunity is not possible. Because even those who have been vaccinated continue to be infected.]



Israel, where about 60% of the total population has received one or more vaccinations, has more than 6,000 confirmed cases a day, the highest since February.



In the United States, where the primary vaccination rate is close to 60%, the average daily number of new confirmed cases again exceeded 100,000 for the first time in half a year.



More than 93% of confirmed cases are delta mutations.



The Washington Post in the US compared the current situation, in which the delta mutation overwhelms all other mutations, to Jurassic Park where the dinosaurs woke up, and reported that the delta mutation changed the standard for herd immunity itself.



(Video editing: Kim Ho-jin)