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.
UPDATE
The White House announced that vaccines will be required for international travelers coming into the United States, with an effective date of November 8, 2021. For purposes of entry into the United States, vaccines accepted will include FDA approved or authorized and WHO Emergency Use Listing vaccines. More information is available here.
UPDATE
Travel requirements to enter the United States are changing, starting November 8, 2021. More information is available here.
COVIDView: A Weekly Surveillance Summary of U.S. COVID-19 Activity

U.S. Clinical Laboratories Reporting SARS-CoV-2 Test Results to CDC

U.S. Clinical Laboratories Reporting SARS-CoV-2 Test Results to CDC
Updated Sept. 11, 2020
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This graph displays the number of respiratory specimens tested and the percent positive for SARS-CoV-2 reported to CDC by U.S. Clinical Laboratories through the National Respiratory and Enteric Virus Surveillance System.
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Week No. of Labs Spec Tested # Pos % Pos
U.S. Clinical Laboratories Reporting SARS-CoV-2 Test Results to CDC
March 8, 2020 – September 5, 2020
Data as of September 10, 2020
202011 32 3,214 209 6.5
202012 49 22,831 1,391 6.1
202013 60 46,510 3,860 8.3
202014 72 56,218 5,923 10.5
202015 90 57,026 6,914 12.1
202016 109 68,229 7,268 10.7
202017 116 90,760 9,053 10
202018 123 113,973 9,685 8.5
202019 132 138,244 9,104 6.6
202020 134 163,350 9,565 5.9
202021 134 202,060 10,578 5.2
202022 144 210,509 10,038 4.8
202023 143 222,305 9,329 4.2
202024 150 227,138 9,587 4.2
202025 148 234,568 10,962 4.7
202026 147 266,708 15,908 6
202027 157 278,859 19,114 6.9
202028 157 309,434 23,086 7.5
202029 157 360,514 24,417 6.8
202030 154 348,191 22,558 6.5
202031 150 335,214 21,232 6.3
202032 144 337,445 20,272 6
202033 147 328,901 18,671 5.7
202034 147 308,232 16,744 5.4
202035 139 291,025 15,720 5.4
202036 78 121,654 5,494 4.5
Total 193 5,143,112 316,682 6.2

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