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COVID-19: About Variants

COVID-19: About Variants

Key Messages The Delta variant is the predominant strain in Wisconsin. The Delta variant is more than two times as infectious, causing it to spread more rapidly and cause more infections. The available COVID-19 vaccines are highly effective at preventing severe illness, hospitalization, and death. The longer a virus sticks around, the more opportunity it has to mutate into potentially more infectious and deadly variants....

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