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FILE PHOTO: People, some wearing protective face masks, walk over Westminster Bridge, amid the coronavirus disease (COVID-19) pandemic, in London, Britain, July 4, 2021. REUTERS/Henry Nicholls/File Photo

SARS-CoV-2 Variants

Multiple variants of the virus that causes COVID-19 are circulating globally, including within the United States. Currently, four variants are classified as a variant of concern (VOC). Nowcast estimates* of COVID-19 cases caused by these VOCs for the week ending August 14 are summarized here. Nationally, the combined proportion of cases attributed to Delta is estimated to increase to 98.8%; Alpha proportion is estimated to decrease to 0.3%; Gamma proportion is estimated to decrease to 0.2%; and Beta is estimated to be less than 0.1%. Nowcast estimates that Delta will continue to be the predominant variant circulating in all 10 U.S. Department of Health and Human Services (HHS) regions. Alpha is estimated to be 0.6% or less in all HHS regions. Gamma is estimated to be 0.5% or less in all HHS regions; and Beta is estimated to be less than 0.1% in all HHS regions.

Reported Cases

The current 7-day moving average of daily new cases (133,056) increased 14.0% compared with the previous 7-day moving average (116,740). The current 7-day moving average is 93.9% higher compared to the peak observed on July 20, 2020 (68,636). The current 7-day moving average is 47.6% lower than the peak observed on January 10, 2021 (254,108) and is 1042.0% higher than the lowest value observed on June 18, 2021 (11,651). A total of 37,259,886 COVID-19 cases have been reported as of August 18.

*Historical cases are excluded from daily new cases and 7-day average calculations until they are incorporated into the dataset for the applicable date. Of 94,471 historical cases reported retroactively, 3,546 were reported in the current week and 10,340 were reported in the prior week.

Vaccinations

The U.S. COVID-19 Vaccination Program began December 14, 2020. As of August 19, 359.6 million vaccine doses have been administered. Overall, about 199.9 million people, or 60.2% of the total U.S. population, have received at least one dose of vaccine. About 169.6 million people, or 51.1% of the total U.S. population, have been fully vaccinated.* As of August 19, the 7-day average number of administered vaccine doses reported (by date of CDC report) to CDC per day was 823,355, a 17.78% increase from the previous week.

CDC’s COVID Data Tracker Vaccination Demographic Trends tab shows vaccination trends by age group. As of August 19, 91.1% of people ages 65 years or older have received at least one dose of vaccine and 81% are fully vaccinated. Over two-thirds (72.5%) of people ages 18 years or older have received at least one dose of vaccine and 62% are fully vaccinated. For people ages 12 years or older, 70.4% have received at least one dose of vaccine and 59.8% are fully vaccinated

Deaths

The current 7-day moving average of new deaths (641) has increased 10.8% compared with the previous 7-day moving average (578). The current 7-day moving average is 47.1% lower compared to the peak observed on July 30, 2020 (1,211). The current 7-day moving average is 82.4% lower than the peak observed on January 13, 2021 (3,644) and is 237.4% higher than the lowest value observed on July 10, 2021 (190). As of August 18, a total of 623,244 COVID-19 deaths have been reported in the United States.

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