Omicron, Delta, Alpha, and More: What To Know About the …
https://www.yalemedicine.org/news/covid-19-variants-of-concern-omicron
WEBSep 1, 2023 · It’s estimated that Delta caused more than twice as many infections as previous variants—in Connecticut, it was estimated to have been 80 to 90% more transmissible than the Alpha variant. In the U.S., in June 2021, after a steady decline in COVID-19 cases and hospitalizations, the arrival of Delta coincided with a rapid reversal …
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