The initial Omicron variant was discovered in Botswana and South Africa In late November 2021.
Omicron's subvariants are thought to be particularly effective at spreading, COVID-19
Delta variant was initially discovered in India in the late 2020s
According to estimates, Delta was 80–90% more contagious than the Alpha variant
Delta AY.4.2 variant was said to be 10-20% more contagious than the Delta variant
Delta AY.4.2 didn't seem to increase the likelihood of being hospitalised or dying.
Near the end of 2020, the Beta variant was discovered in South Africa and spread to other nations
Compared to the original coronavirus strain, beta was approximately 50% more infectious
In November 2020, Alpha first emerged in Great Britain
Alpha quickly spread all over the world and took over as the main variant in the US.
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