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"The booster is needed to stem the impacts from the strength of the Delta variant created by the vaccine designed for the original COVID-19 virus. The Delta booster will address the mutation of the virus, created by the vaccine."
Delta was first identified in India in December 2020.
Mu was firat identified in Columbia in Jan 2021
Last edited by Sooner or later; 09-09-2021 at 08:07 AM..
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