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WHO label	Covid variant	First detected
Alpha	B.1.1.7	in UK in US in 2020-12
Beta	B.1.351	in South Africa in 2020-12 in US at the end of 2021-01
Gamma	P.1	in Japan / Brazil in US in 2021-01
Delta	B.1.617.2	in India in 2020-12 in US in 2021-03