Important update: Healthcare facilities
CDC has updated select ways to operate healthcare systems effectively in response to COVID-19 vaccination. Learn more
To maximize protection from the Delta variant and prevent possibly spreading it to others, get vaccinated as soon as you can and wear a mask indoors in public if you are in an area of substantial or high transmission.
UPDATE
Given new evidence on the B.1.617.2 (Delta) variant, CDC has updated the guidance for fully vaccinated people. CDC recommends universal indoor masking for all teachers, staff, students, and visitors to K-12 schools, regardless of vaccination status. Children should return to full-time in-person learning in the fall with layered prevention strategies in place.
Covid Tracker Weekly Review

Don’t Run Down the Shot Clock

Don’t Run Down the Shot Clock
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Interpretive Summary for July 30, 2021  

Don’t Run Down the Shot Clock

COVID-19 cases, hospitalizations, and deaths are once again increasing in nearly all states, fueled by the B.1.617.2 (Delta) variant, which is much more contagious than past versions of the virus. The highest spread of cases and severe outcomes is happening in places with low vaccination rates. Although COVID-19 vaccination is the most effective prevention measure, vaccination rates across the United States have varied.

COVID-19 vaccines are very effective, but no vaccine is perfect. In some instances, fully vaccinated people will get COVID-19 and may be contagious. These are called “vaccine breakthrough cases.” A new CDC study finds that B.1.617.2 (Delta) can lead to breakthrough infections. This means that while vaccinated people are much less likely to get sick, it will still happen in some cases. As the number of people who are vaccinated goes up, the number of breakthrough cases is also expected to increase, even as the vaccines remain highly effective.

United States Levels of Community Transmission by County as of July 27, 2021

United States Levels of Community Transmission by County as of July 27, 2021

Vaccines help protect people from getting COVID-19 or from getting severely ill from it. Unvaccinated people should get vaccinated and continue masking. CDC also recommends that fully vaccinated people wear masks in public indoor settings in areas of substantial or high transmission. With the B.1.617.2 (Delta) variant rapidly spreading throughout the country, this is more urgent than ever. To find a vaccine provider near you, visit Vaccines.gov or your state or local public health department website. If you or someone you know is hesitant about COVID-19 vaccination, CDC has information and answers to frequently asked questions to help them inform their decision.

Note to readers: On July 27, 2021, CDC announced updated Guidance for COVID-19 Prevention Strategies. Among strategies to prevent COVID-19, CDC recommends all unvaccinated people wear masks in public indoor settings. Based on emerging evidence of the B.1.617.2 (Delta) variant, CDC also recommends that fully vaccinated people wear masks in public indoor settings in areas of substantial or high transmission. To see the level of community transmission in your county, visit COVID Data Tracker.

Reported Cases

The current 7-day moving average of daily new cases (66,606) increased 64.1% compared with the previous 7-day moving average (40,597). The current 7-day moving average is 73.8% lower than the peak observed on January 10, 2021 (254,063) and is 480.1% higher than the lowest value observed on June 19, 2021 (11,483). A total of 34,722,631 COVID-19 cases have been reported as of July 28.

34,722,631
Total Cases Reported

66,606
Current 7-Day Average*

40,597
Prior 7-Day Average

+64.1%
Change in 7-Day Average since Prior Week 

*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 77,785 historical cases reported retroactively, 2,086 were reported in the current week and 1,469 were reported in the prior week.

Daily Trends in COVID-19 Cases in the United States Reported to CDC

red line

7-Day moving average

Daily Trends in COVID-19 Cases in the United States Reported to CDC 07-30-21

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 SARS-CoV-2 cases caused by these VOCs for the two weeks ending July 17 are summarized here. Nationally, the proportion of cases attributed to B.1.617.2 (Delta) is predicted to increase to 82.2%; B.1.1.7 (Alpha) proportion is predicted to decrease to 9.0%; P.1 (Gamma) proportion is predicted to decrease to 3.8%; and B.1.351 (Beta) is predicted to remain steady at 0.1%. Nowcast estimates predict that B.1.617.2 (Delta) will continue to be the predominant lineage circulating in all HHS regions and be more than 70% in nine HHS regions. B.1.1.7 (Alpha) is predicted to be less than or equal to 21% in all HHS regions. P.1 (Gamma) is predicted to be less than 9% in all HHS regions; and B.1.351 (Beta) is predicted to be less than or equal to 0.2% in all HHS regions.

*The median time from specimen collection to sequence data reporting is about 3 weeks. As a result, weighted estimates for the most recent few weeks may be unstable or unavailable. CDC’s Nowcast is a data projection tool that helps fill this gap by generating timely estimates of variant proportions for variants that are circulating in the United States. View Nowcast estimates on CDC’s COVID Data Tracker website on the Variant Proportions page.

SARS-CoV-2 Variants Circulating in the United States

SARS-CoV-2 Variants Circulating in the United States 07-30-21 Map with pie charts overlay Regional Variant Proportions 07-30-21 More Variants Data

Testing

The percentage of COVID-19 NAATs (nucleic acid amplification tests) that are positive (percent positivity) has increased from the previous week. The 7-day average of percent positivity from tests is now 7.8%. The 7-day average number of tests reported for July 16 – Jul 22 was 698,611 up 14.5% from 610,004 for the prior 7 days.

486,000,511 
Total Tests Reported

486,000,511 
Total Tests Reported

698,611
7-Day Average Tests Reported

7.8%
7-Day Average % Positivity

486,000,511 
Total Tests Reported

6.0%
Previous 7-Day Average % Positivity

+31.0%
Change in 7-Day Average % Positivity since Prior Week

COVID-19 NAAT Laboratory Test 7-day Percent Positivity by State/Territory

COVID-19 NAAT Laboratory Test 7-day Percent Positivity by State/Territory 07-30-21

Vaccinations

The U.S. COVID-19 Vaccination Program began December 14, 2020. As of July 29, 344.1 million vaccine doses have been administered. Overall, about 189.9 million people, or 57.2% of the total U.S. population, have received at least one dose of vaccine. About 163.9 million people, or 49.4% of the total U.S. population, have been fully vaccinated.* As of July 29, the 7-day average number of administered vaccine doses reported (by date of CDC report) to CDC per day was 615,404, a 16.15% increase from the previous week.

CDC’s COVID Data Tracker Vaccination Demographic Trends tab shows vaccination trends by age group. As of July 29, 89.7% of people ages 65 or older have received at least one dose of vaccine and 79.9% are fully vaccinated. Over two-thirds (69.4%) of people ages 18 or older have received at least one dose of vaccine and 60.3% are fully vaccinated. For people ages 12 or older, 66.9% have received at least one dose of vaccine and 57.7% are fully vaccinated.

344,071,595
Vaccines Administered

189,945,907
People who received at least one dose

163,868,916
People who are fully vaccinated*

57.2%
Percentage of the US population that has received at least one dose

49.4%
Percentage of the US population that has been fully vaccinated*

+0.8
Percentage point increase from last week

+0.6
Percentage point increase from last week

*People are considered fully vaccinated 2 weeks after their second dose in a 2-dose series (such as the Pfizer or Moderna vaccines), or 2 weeks after a single-dose vaccine (such as Johnson & Johnson’s Janssen vaccine).

 

 

 

Daily Change in the Total Number of Administered Doses Reported to CDC by the date of CDC Report, United States

 

red line

7-Day moving average

Daily Change in Number of COVID-19 Vaccinations in the United States Reported to CDC 07-30-21

Hospitalizations

New Hospital Admissions

The current 7-day average for July 21–July 27 was 5,475. This is a 46.3% increase from the prior 7-day average (3,742) from July 14–July 20. The 7-day moving average for new admissions has consistently increased since June 25, 2021.

2,381,644
Total New Admissions

5,475
Current 7-Day Average

3,742
Prior 7-Day Average

+46.3%
Change in 7-Day Average

The start of consistent reporting of hospital admissions data was August 1, 2020.

Daily Trends in Number of New COVID-19 Hospital Admissions in the United States

Daily Trends in Number of New COVID-19 Hospital Admissions in the United States 07-30-21

New admissions are pulled from a 10 am EST snapshot of the HHS Unified Hospital Timeseries Dataset. Due to potential reporting delays, data from the most recent 7 days, as noted in the figure above with the grey bar, should be interpreted with caution. Small shifts in historic data may also occur due to changes in the CMS Provider of Services file, which is used to identify the cohort of included hospitals.

COVID-NET: Trends in Hospitalizations in Adults Ages 18–49 Years

CDC’s Coronavirus Disease 2019-Associated Hospitalization Surveillance Network (COVID-NET) shows that hospitalization rates are increasing in younger adults. While adults ages 65 years and older are most at-risk, younger adults are also at risk for COVID-19-associated hospitalizations. Rates of hospitalization remain low when compared to previous months of the pandemic, but preliminary data show that weekly rates of COVID-19-associated hospitalizations have increased significantly for adults ages 18 to 49 years. Compared to June 26, 2021, weekly rates in adults ages 18–49 years for the week ending July 10, 2021 have increased by nearly 40%. These are the first increases in rates of COVID-19-associated hospitalizations seen in this age group since April 2021.

Trends in Rates of COVID-19-Associated Hospitalizations in Adults Ages 18–49 Years

Trends in Rates of COVID-19-Associated Hospitalizations in Adults Ages 18–49 Years chart

The Coronavirus Disease 2019 (COVID-19)-Associate¬¬d Hospitalization Surveillance Network (COVID-NET) is an additional source for hospitalization data collected through a network of more than 250 acute-care hospitals in 14 states (representing ~10% of the U.S. population). Detailed data on patient demographics, including race/ethnicity, underlying medical conditions, medical interventions, and clinical outcomes, are standardized case reporting form.

More COVID-NET Data

Deaths

The current 7-day moving average of new deaths (296) has increased 33.3% compared with the previous 7-day moving average (222). The current 7-day moving average is 91.8% lower than the peak observed on January 13, 2021 (3,625) and is 77.1% higher than the lowest value observed on July 10, 2021 (167). As of July 28, a total of 609,853 COVID-19 deaths have been reported.

609,853
Total Deaths Reported

296
Current 7-Day Average*

222
Prior 7-Day Average

+33.3%
Change in 7-Day Average Since Prior Week

*Historical deaths are excluded from the daily new deaths and 7-day average calculations until they are incorporated into the dataset by their applicable date. Of 6,143 historical deaths reported retroactively, 26 were reported in the current week and 8 were reported in the prior week.

Daily Trends in Number of COVID-19 Deaths in the United States Reported to CDC

red line

7-Day moving average

Daily Trends in Number of COVID-19 Deaths in the United States Reported to CDC 07-30-21
More Death Data

Recent COVID Data Tracker Updates

  •  The Vaccination Trends tab now displays trends by state and jurisdiction
  • The Vaccination Among Pregnant People tab displays the percent of pregnant people ages 18-49 years receiving at least one dose of a COVID-19 vaccine during pregnancy overall and by race/ethnicity
  • The Vaccine Confidence tab allows users to explore trends in vaccine confidence in the United States by visualizing trends in vaccination status and intent by week and by demographics