“During May–November 2021, case and hospitalization rates were highest among persons who were unvaccinated without a previous diagnosis. Before Delta became the

“During May–November 2021, case and hospitalization rates were highest among persons who were unvaccinated without a previous diagnosis. Before Delta became the predominant variant in June, case rates were higher among persons who survived a previous infection than persons who were vaccinated alone. By early October, persons who survived a previous infection had lower case rates than persons who were vaccinated alone.” https://www.cdc.gov/mmwr/volumes/71/wr/mm7104e1.htm https://www.cdc.gov/mmwr/volumes/71/wr/mm7104e1.htm