Covid 19 Delta Variant Risk And Vaccine Efficacy
One of these variants is B.1.617.2, also known as the Delta variant. This variant was initially discovered in India in December 2020 before it spread across the globe. Where Delta Has Spread After starting in India in 2020, the B.1.617.2 variant became the dominant strain in that country and globally until the worldwide surge of the Omicron variant (B.1.1.529) in late 2021. The Delta variant was detected in people in over 130 countries during its spread, including the United States, Canada, and England....