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We need to be prepared for new Covid-19 waves: WHO Chief Scientist Soumya Swaminathan

There is mounting evidence that suggests that Omicron subvariants –BA.4 and BA.5 – are infecting people who have been vaccinated
Last Updated : 16 July 2022, 03:26 IST

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Published 15 July 2022, 16:53 IST

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