Updated Aug 19, 2021 - World

New Zealand's PM says scientists have solved COVID outbreak "puzzle"

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New Zealand Prime Minister Jacinda Ardern speaks during a COVID-19 response update at Parliament on August 18, 2021 in Wellington, New Zealand.

Prime Minister Jacinda Ardern speaks during a COVID-19 response update at Parliament in Wellington, New Zealand, on Wednesday. Photo: Mark Mitchell - Pool/Getty Images

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