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Analysis: Delta variant nearly twice as contagious | NHK WORLD-JAPAN News

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Researchers at Kyoto University and Hokkaido University present their analysis at the advisory panel to the Health Ministry in Japan on the Delta variant on June 23. The research by Prof. Hiroshi and Prof. Kimihito shows the Delta variant from India is 1.95 times more transmissible than the original virus.

The group of researchers examined PCR tests from Japan and an international database for their analysis. Based on data from Japan the researchers looked at the Delta variant is projected to account for more than half of new cases in Japan by July 12. By the time the Tokyo Olympics open on July 23 this variant is projected to account for 69% of new cases.  The researchers say the recent lifting of the emergency restrictions in Tokyo and other cities as well as the high transmissibility of the new variant is likely to increase risks from infections in future.

 



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